JP5246755B2 - Trans bobbin - Google Patents

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JP5246755B2
JP5246755B2 JP2008115005A JP2008115005A JP5246755B2 JP 5246755 B2 JP5246755 B2 JP 5246755B2 JP 2008115005 A JP2008115005 A JP 2008115005A JP 2008115005 A JP2008115005 A JP 2008115005A JP 5246755 B2 JP5246755 B2 JP 5246755B2
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winding
lead
terminal
groove
wire
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JP2009267087A (en
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剛 池谷
英之 秋山
豊 池田
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FDK Corp
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Description

本発明は、３層被覆構造の強化絶縁電線（本発明では単に「３層絶縁電線」という）を用いて安全規格に必要な絶縁距離を管理しているトランスに関し、更に詳しく述べると、３層絶縁電線の引き出し線部分を、その絶縁被覆が引き出し溝のエッジ部に圧接するように引き回し、半田付け時における絶縁被覆の溶け上がりが前記エッジ部で規制されるようにしたトランスボビンに関するものである。この技術は、例えば各種インバータ機器に使用するトランスなどに有用である。   The present invention relates to a transformer that uses a reinforced insulated wire having a three-layer covering structure (in the present invention, simply referred to as “three-layer insulated wire”) to manage an insulation distance necessary for safety standards. The present invention relates to a transbobbin in which a lead wire portion of an insulated wire is routed so that the insulation coating is in pressure contact with the edge portion of the lead groove, and the melting of the insulation coating during soldering is regulated by the edge portion. . This technique is useful for transformers used for various inverter devices, for example.

トランスは、一般に、ボビンの巻枠部に１次巻線と２次巻線とを巻装すると共に、端子保持部に突設した複数の端子に各巻線端末を接続し、１次巻線と２次巻線とが磁気的に結合するように磁気コアを配設した構造となっている。その場合、１次巻線と２次巻線との間を十分に絶縁する必要があり、その一つの方策として、どちらか一方の巻線に３層絶縁電線を用い、他方の巻線に単層絶縁電線を用いる構成がある。   In general, a transformer has a primary winding and a secondary winding wound around a bobbin winding frame portion, and each winding terminal is connected to a plurality of terminals protruding from a terminal holding portion. The magnetic core is disposed so as to be magnetically coupled to the secondary winding. In such a case, it is necessary to sufficiently insulate between the primary winding and the secondary winding. As one measure, a three-layer insulated wire is used for one of the windings and a single winding is used for the other winding. There is a configuration using a layer insulated wire.

どちらか一方の巻線に３層絶縁電線を用いる構成は、線材自体のコストは高くなるが、両方の巻線に単層絶縁電線を用いる一般的な構成に比べて、層間の絶縁テープが不要であり、そのため巻線部のサイズを小さくでき、絶縁テープを巻き付ける工数が減り、製造し易いため、トータル的にはコスト低減が可能とされている。   The configuration using a three-layer insulated wire for one of the windings increases the cost of the wire itself, but does not require an insulating tape between layers compared to a typical configuration using a single-layer insulated wire for both windings Therefore, the size of the winding portion can be reduced, the man-hour for winding the insulating tape is reduced, and the manufacturing is easy, so that the total cost can be reduced.

ところで、１次巻線と２次巻線との間で確保すべき絶縁性能としては、安全規格に適合した沿面距離を満たしていることが必要である。この場合の沿面距離とは、巻線端末の被覆を除去して端子に絡げて半田付けされている部分の被覆端から、その被覆に対して最も近い位置で接触している他の巻線までの距離のことである。ここで問題となるのは、３層絶縁電線は、本質的に絶縁性能が優れているものの、絶縁被覆の耐熱性が劣るために、半田付け時に被覆の溶け上がりが生じる恐れがあるということである。   By the way, as the insulation performance to be ensured between the primary winding and the secondary winding, it is necessary to satisfy a creepage distance conforming to the safety standard. The creepage distance in this case refers to the other winding that is in contact with the coating at the closest position from the coating end of the portion that is soldered by removing the coating of the winding end and tying it to the terminal It is the distance to. The problem here is that, although the three-layer insulated wire is inherently excellent in insulation performance, the insulation coating is inferior in heat resistance, so that the coating may melt when soldering. is there.

トランスの製造では、１次巻線と２次巻線の各巻線端末を端子保持部の各端子に絡げて半田付けする工程がある。半田付けは、端子に巻線端末を絡げた状態の端子保持部を溶融半田に浸漬することで行う。具体的には、ポリウレタン被覆電線（単層絶縁電線）の半田付けは４００℃程度で行われるが、３層絶縁電線は３００℃程度でも被覆が溶け出すことがある。そのため、溶融半田の熱によって、浸漬されていない部分でも被覆が溶けたり劣化することは避けられない。そこで、半田温度や半田付け時間の管理を行うことで被覆の溶け上がりを抑制し、必要な沿面距離を確保することが行われている。   In the manufacture of the transformer, there is a process of winding each winding terminal of the primary winding and the secondary winding around each terminal of the terminal holding portion and soldering. Soldering is performed by immersing the terminal holding portion in a state where the winding terminal is entangled with the terminal in molten solder. Specifically, the polyurethane-coated electric wire (single-layer insulated wire) is soldered at about 400 ° C., but the coating of the three-layer insulated wire may melt even at about 300 ° C. For this reason, it is inevitable that the coating melts or deteriorates even in an unimmersed portion due to the heat of the molten solder. Therefore, by controlling the solder temperature and the soldering time, it is possible to suppress the melting of the coating and to secure the necessary creepage distance.

ところが、実際には、いかに半田温度や半田付け時間を厳密に管理しても、線材特性のばらつきや半田付け条件のばらつきなどにより、予期せぬ被覆の溶け上がりが発生して必要な沿面距離が確保できなくなる可能性もある。このような問題を解消するため、ボビン上の引き出し線部分に熱硬化性樹脂を塗布して、半田付け時の熱を熱硬化性樹脂に拡散させることで被覆が熱破壊されるのを防止する技術が提案されている（特許文献１参照）。しかし、引き出し線部分にいちいち熱硬化性樹脂を塗布する作業は煩瑣であり、工数の増加、コストアップをもたらす。   However, in practice, no matter how strictly the soldering temperature or soldering time is controlled, unexpected coating melts due to variations in wire characteristics or soldering conditions, resulting in the necessary creepage distance. There is a possibility that it cannot be secured. In order to solve such problems, a thermosetting resin is applied to the lead wire portion on the bobbin, and the heat at the time of soldering is diffused into the thermosetting resin to prevent the coating from being thermally destroyed. A technique has been proposed (see Patent Document 1). However, the operation of applying the thermosetting resin to the lead wire portion is troublesome, resulting in an increase in man-hours and an increase in cost.

また、巻枠部の巻軸が実装面に平行な横型ボビンの場合には、引き出し線部分は端子保持部の底面に位置することになるため、端子に絡げた３層絶縁電線の被覆部分が溶け銅線のみになることで電線が弛んでしまい、引き出し線部分の浮き（垂れ下がり）が発生する問題があった。この問題は、上記のように引き出し線部分に熱硬化性樹脂を塗布することで解消できるが、実装基板に対向する底面に樹脂が付着することになるために突起部ができ、実装に支障が生じるなど別の問題がある。
特開平９−６３８６３号公報 Further, in the case of a horizontal bobbin in which the winding axis of the winding frame portion is parallel to the mounting surface, the lead wire portion is positioned on the bottom surface of the terminal holding portion. There was a problem that the wire was loosened only by the molten copper wire, and the lead wire portion was lifted (drooped). This problem can be solved by applying a thermosetting resin to the lead wire portion as described above, but since the resin adheres to the bottom surface facing the mounting substrate, a protrusion is formed, which hinders mounting. There is another problem, such as that.
JP-A-9-63863

本発明が解決しようとする課題は、部品の大型化や作業工数・コストの増加などを伴うことなく、３層絶縁電線の半田付け時における絶縁被覆の溶け上がりを正確に規制でき、必要な沿面距離を確保できるようにすることである。本発明が解決しようとする他の課題は、横型ボビンでも、作業工数・コストの増加などを伴うことなく、３層絶縁電線の引き出し線部分の浮きが発生しないようにすることである。   The problem to be solved by the present invention is that it is possible to accurately regulate the melting of the insulation coating when soldering a three-layer insulated wire without accompanying an increase in the size of parts, an increase in work man-hours and costs, etc. It is to be able to secure a distance. Another problem to be solved by the present invention is to prevent floating of the lead wire portion of the three-layer insulated wire without increasing work man-hours and costs even in the horizontal bobbin.

本発明は、１次巻線と２次巻線とを互いに絶縁された状態で巻装する巻枠部と、複数の端子が固定されている端子保持部とが連続一体に成形され、前記１次巻線と２次巻線の巻線端末がそれぞれ端子保持部の端子に接続される構造であって、１次巻線と２次巻線のいずれか一方に３層絶縁電線を使用し、前記端子保持部に、３層絶縁電線の引き出し線部分を巻枠部から端子に案内する引き出し溝が形成されているトランスボビンにおいて、前記引き出し溝は、その途中で交差する分割溝によって分断され、それによって一つの引き出し溝から分割溝へ、分割溝から別の引き出し溝へと前記引き出し線部分の引き出し方向を変えるエッジ部が形成され、該エッジ部に引き出し線部分の絶縁被覆が圧接した状態で、３層絶縁電線の引き出し線部分が引き出し溝と分割溝を通って引き回されるようにしたことを特徴とするトランスボビンである。
 According to the present invention, a winding frame portion for winding the primary winding and the secondary winding in a state of being insulated from each other and a terminal holding portion to which a plurality of terminals are fixed are formed integrally and continuously. The winding end of the secondary winding and the secondary winding are connected to the terminals of the terminal holding part, respectively, using a three-layer insulated wire for either the primary winding or the secondary winding, In the transbobbin in which a lead groove for guiding the lead wire portion of the three-layer insulated wire to the terminal from the winding frame portion is formed in the terminal holding portion, the lead groove is divided by a split groove that intersects in the middle, As a result, an edge part is formed to change the lead-out direction of the lead-out line part from one lead-out groove to the split groove, and from the split groove to another lead-out part, and the insulation coating of the lead-out line part is pressed against the edge part Lead-out part of 3-layer insulated wire Trans bobbins, characterized in that it has to be routed through the lead-out trenches with dividing groove.

本発明に係るトランスボビンは、縦型でもよいし横型でもよい。例えば、巻枠部の巻軸が実装面に垂直な縦型の場合には、引き出し溝が端子保持部の側面（上下面を除く前後左右のいずれかの面）に形成されている構造とし、巻枠部の巻軸が実装面に平行な横型の場合には、引き出し溝が端子保持部の底面に形成されている構造とする。なお、本発明において、前記エッジ部を形成する位置は、３層絶縁電線の被覆溶け上がりが許容される範囲内とする。   The transbobbin according to the present invention may be a vertical type or a horizontal type. For example, when the winding axis of the winding frame portion is a vertical type perpendicular to the mounting surface, the drawing groove is formed on the side surface of the terminal holding portion (any one of the front, back, left and right surfaces excluding the top and bottom surfaces) When the winding axis of the winding frame portion is a horizontal type parallel to the mounting surface, the drawing groove is formed on the bottom surface of the terminal holding portion. In the present invention, the position where the edge portion is formed is within a range where the coating melt of the three-layer insulated wire is allowed.

これらのトランスボビンを使用し、巻枠部に巻装した１次巻線と２次巻線の巻線端末を端子保持部の端子に接続し、巻枠部の内側と外側を囲むように配置される磁気コアによって１次巻線と２次巻線が磁気的に結合するように構成することでトランスが得られる。   Using these transbobbins, the winding ends of the primary and secondary windings wound around the winding frame are connected to the terminals of the terminal holding unit, and arranged so as to surround the inside and outside of the winding frame. The transformer is obtained by configuring the primary winding and the secondary winding to be magnetically coupled by the magnetic core that is formed.

本発明のトランスボビンは、３層絶縁電線の巻線端末を端子に案内する引き出し溝の途中に、引き出し線部分の引き出し方向を変えるエッジ部を有し、該エッジ部に引き出し線部分の絶縁被覆が圧接した状態で、３層絶縁電線の引き出し線部分が引き出し溝内を引き回されるように構成されているので、半田付け時における絶縁被覆の溶け上がりが前記エッジ部で規制され、ボビンの大型化や作業工数の増加などを伴うことなく、必要な沿面距離を確保できる。   The transbobbin of the present invention has an edge portion for changing the drawing direction of the lead wire portion in the middle of the lead groove for guiding the winding end of the three-layer insulated wire to the terminal, and the insulation coating of the lead wire portion is provided on the edge portion. Since the lead wire portion of the three-layer insulated wire is configured to be routed in the lead groove with the pressure contact, the melting of the insulating coating during soldering is regulated by the edge portion, and the bobbin The required creepage distance can be secured without increasing the size or increasing the number of work steps.

また、横型のトランスボビンの場合でも、引き出し線部分の被覆が引き出し溝のエッジ部に圧接されているので、引き出し線部分の浮きは発生せず、引き出し溝が形成されている底面（実装基板との対向面）に不要な突起部なども生じない。   Further, even in the case of a horizontal type transbobbin, since the covering of the lead wire portion is pressed against the edge portion of the lead groove, the lead wire portion does not float, and the bottom surface on which the lead groove is formed (with the mounting substrate) Unnecessary protrusions or the like are not generated on the opposite surface.

図１は、本発明に係るトランスボビンの一実施例を示す説明図であり、Ａは上面方向から見た斜視図、Ｂは底面方向から見た斜視図、Ｃは正面図、Ｄは側面図である。なお、この実施例は、巻枠部の巻軸が実装面に垂直となる縦型の例である。   FIG. 1 is an explanatory view showing an embodiment of a transbobbin according to the present invention, in which A is a perspective view seen from the top surface direction, B is a perspective view seen from the bottom surface direction, C is a front view, and D is a side view. It is. This embodiment is an example of a vertical type in which the winding axis of the winding frame portion is perpendicular to the mounting surface.

トランスボビンは、１次巻線と２次巻線とを互いに絶縁された状態で巻装する巻枠部１０と、複数の端子１２が固定されている端子保持部１４とが連続一体に成形され、前記１次巻線と２次巻線の巻線端末が端子保持部１４の端子１２に接続される構造である。巻枠部１０は、四角筒状の巻胴１６と、その上下両端に形成されている上部フランジ１８及び下部フランジ２０からなる。端子保持部１４は、前後に位置し、それぞれ前記下部フランジ２０に連続している。端子１２はピン端子であり、端子保持部１４の下面から下向きに突設されている。ここでは、１次巻線と２次巻線のいずれか一方に３層絶縁電線を使用する。そして、端子保持部１４に、３層絶縁電線の引き出し線部分を巻枠部１０から端子１２に（あるいは端子から巻枠部へ）案内する引き出し溝２２が設けられている。   In the transbobbin, a winding frame portion 10 for winding the primary winding and the secondary winding in a state of being insulated from each other, and a terminal holding portion 14 to which a plurality of terminals 12 are fixed, are integrally formed. The winding terminals of the primary winding and the secondary winding are connected to the terminal 12 of the terminal holding unit 14. The winding frame portion 10 includes a rectangular cylindrical winding drum 16 and an upper flange 18 and a lower flange 20 formed at both upper and lower ends thereof. The terminal holding portions 14 are located at the front and rear, and are continuous with the lower flange 20. The terminal 12 is a pin terminal and protrudes downward from the lower surface of the terminal holding portion 14. Here, a three-layer insulated wire is used for either the primary winding or the secondary winding. The terminal holding part 14 is provided with a lead-out groove 22 for guiding the lead-out line part of the three-layer insulated wire from the winding frame part 10 to the terminal 12 (or from the terminal to the winding frame part).

本実施例では、引き出し溝２２は、端子保持部１４の前面に上端から下端に至るように複数本上下方向に形成されており、その途中で交差する分割溝２４によって分断されている。ここでは、分割溝２４は、端子保持部１４の前面にて右端から左端に達するように設けている。なお、分割溝２４の深さは任意であってよいが、ここでは引き出し溝２２よりも若干浅く形成している。このように、引き出し溝２２が、その途中で交差する分割溝２４で分断されることによって、一つの引き出し溝から分割溝へ、分割溝から別の引き出し溝へと引き出し線部分の引き出し方向を変えるエッジ部ｅが形成されることになる。このように、引き出し溝２２の途中に引き出し線部分の引き出し方向を変えるエッジ部ｅが形成されている点に、本発明の特徴がある。   In the present embodiment, a plurality of lead-out grooves 22 are formed on the front surface of the terminal holding portion 14 in the vertical direction so as to extend from the upper end to the lower end, and are divided by divided grooves 24 that intersect in the middle. Here, the dividing groove 24 is provided so as to reach the left end from the right end on the front surface of the terminal holding portion 14. The depth of the dividing groove 24 may be arbitrary, but here it is formed slightly shallower than the drawing groove 22. In this way, the drawing groove 22 is divided by the dividing groove 24 that intersects in the middle, thereby changing the drawing direction of the drawing line portion from one drawing groove to the dividing groove and from the dividing groove to another drawing groove. An edge portion e is formed. As described above, the present invention is characterized in that the edge portion e that changes the drawing direction of the lead line portion is formed in the middle of the lead groove 22.

このようなトランスボビンを用いたトランス巻線構成例を図２に示す。図２のＡに示すように、２本の１次巻線Ｐ１，Ｐ２と１本の２次巻線Ｓとを巻装する。ここで１次巻線には通常の単層絶縁電線（ポリウレタン被覆電線）を使用し、２次巻線には３層絶縁電線を使用している。図２のＡに示すように、トランスボビンの巻枠部１０に、内側から第１の１次巻線Ｐ１、２次巻線Ｓ、第２の１次巻線Ｐ２の順に３層で巻き付けている。各巻線の端末は端子まで引き出され、該端子に絡げて半田付けすることで接続が完了する。   A transformer winding configuration example using such a transbobbin is shown in FIG. As shown in FIG. 2A, two primary windings P1 and P2 and one secondary winding S are wound. Here, a normal single-layer insulated wire (polyurethane-coated wire) is used for the primary winding, and a three-layer insulated wire is used for the secondary winding. As shown in FIG. 2A, the first primary winding P1, the secondary winding S, and the second primary winding P2 are wound around the winding bobbin portion 10 of the transbobbin in three layers in this order from the inside. Yes. The end of each winding is pulled out to the terminal, and the connection is completed by tying it to the terminal and soldering.

３層絶縁電線の端末処理の例を図３に示す。図３のＡは、図１に示したトランスボビンを用いた例である。３層絶縁電線の引き出し線部分を太線（符号ｗ）で示してある。３層絶縁電線は、溝中心線がずれた別の引き出し溝を通り、その絶縁被覆が引き出し溝のエッジ部ｅに圧接するように引き回される。言い換えると、引き出し溝２２は、その途中で交差する分割溝２４によって分断されているから、引き出し線部分ｗは、一つの引き出し溝から分割溝へ、分割溝から別の引き出し溝へと引き回され、巻線端末が端子１２に絡げられる。従って、引き回される際に、３層絶縁電線の引き出し線部分ｗは、その絶縁被覆がエッジ部ｅに圧接した状態となる。   An example of the terminal treatment of a three-layer insulated wire is shown in FIG. FIG. 3A shows an example using the transbobbin shown in FIG. The lead wire portion of the three-layer insulated wire is indicated by a thick line (reference symbol w). The three-layer insulated wire is routed so that the insulation coating is in pressure contact with the edge portion e of the lead groove through another lead groove whose groove center line is shifted. In other words, since the lead-out groove 22 is divided by the split grooves 24 that intersect in the middle, the lead-out line portion w is routed from one lead-out groove to the split groove and from the split groove to another lead-out groove. The winding terminal is entangled with the terminal 12. Therefore, when being drawn, the lead wire portion w of the three-layer insulated wire is in a state where the insulating coating is in pressure contact with the edge portion e.

端子に絡げられた巻線端末は、溶融半田に浸漬することで半田付け処理される。溶融半田による熱で３層絶縁電線の引き出し線部分の絶縁被覆が溶け上がろうとするが、エッジ部ｅで圧接状態となっているため、熱は端子保持部１４へと伝わり、エッジ部ｅよりも上方には溶け上がらない。つまり、半田付け時における絶縁被覆の溶け上がりは、前記エッジ部ｅで規制されることになる。端子側からエッジ部の位置（分割溝の下側の内側面の位置）までが溶け上がり許容部分ａとなるので、分割溝２４の形成位置を決めておくだけで必要な絶縁距離（１次巻線と２次巻線間の絶縁距離）ｂを確保することができる。逆に言うと、前記エッジ部ｅは、３層絶縁電線の被覆溶け上がり許容範囲内に形成するということになる。   The winding end entangled with the terminal is soldered by being immersed in molten solder. Although the insulation coating of the lead-out wire portion of the three-layer insulated wire tends to melt due to the heat from the molten solder, the heat is transferred to the terminal holding portion 14 because the edge portion e is in pressure contact state, and from the edge portion e Does not melt upward. That is, the melting of the insulating coating during soldering is restricted by the edge portion e. Since the portion from the terminal side to the edge portion (the position of the inner surface on the lower side of the dividing groove) melts and becomes an allowable portion a, the necessary insulation distance (primary winding) can be obtained only by determining the forming position of the dividing groove 24. An insulation distance b) between the wire and the secondary winding can be ensured. In other words, the edge portion e is formed within the allowable range of the coating of the three-layer insulated wire.

図３のＢに示す例は、引き出し溝２２の下端側に切欠き２６を設けたもので、このようにすると溝形状は若干複雑になるが、３層絶縁電線の引き出し線部分ｗの絶縁被覆が圧接するエッジ部ｅが増えることになり、半田熱による絶縁被覆の溶け上がりをより一層確実に防ぐことができる。   In the example shown in FIG. 3B, a notch 26 is provided on the lower end side of the lead-out groove 22, which makes the groove shape slightly complicated, but the insulation coating of the lead-out wire portion w of the three-layer insulated wire As a result, the number of edge portions e that are in pressure contact with each other increases, and the melting of the insulating coating due to soldering heat can be prevented more reliably.

図４は、本発明に係るトランスボビンの他の実施例を示す説明図であり、Ａは正面図、Ｂは底面図、Ｃは底面方向から見た斜視図である。なお、この実施例は、巻枠部の巻軸が実装面に水平な横型の例である。   FIG. 4 is an explanatory view showing another embodiment of the transbobbin according to the present invention, in which A is a front view, B is a bottom view, and C is a perspective view seen from the bottom direction. This embodiment is a horizontal type in which the winding axis of the winding frame portion is horizontal to the mounting surface.

トランスボビンは、１次巻線と２次巻線とを互いに絶縁された状態で巻装する巻枠部３０と、複数の端子３２が固定されている端子保持部３４とが連続一体に成形され、前記１次巻線と２次巻線の巻線端末が端子保持部３４の端子３２に接続される構造である。巻枠部３０は、四角筒状の巻胴３６と、その左右両端に形成されている左フランジ３８及び右フランジ４０からなる。端子保持部３４は、左右に位置し、左側の端子保持部は左フランジ３８に、右側の端子保持部は右フランジ４０に連続している。端子３２はピン端子であり、端子保持部３４の下面から下向きに突設されている。ここで、１次巻線と２次巻線のいずれか一方に３層絶縁電線を使用する。そして、左側の端子保持部に、３層絶縁電線の引き出し線部分を巻枠部３０から端子３２に（あるいは端子から巻枠部へ）案内する引き出し溝４２が設けられている。   In the transbobbin, a winding frame portion 30 that winds the primary winding and the secondary winding in a state of being insulated from each other, and a terminal holding portion 34 to which a plurality of terminals 32 are fixed are continuously formed integrally. The winding terminals of the primary winding and the secondary winding are connected to the terminal 32 of the terminal holding portion 34. The winding frame portion 30 includes a rectangular cylindrical winding drum 36, and a left flange 38 and a right flange 40 formed at both left and right ends thereof. The terminal holding part 34 is located on the left and right, the left terminal holding part is continuous with the left flange 38, and the right terminal holding part is continuous with the right flange 40. The terminal 32 is a pin terminal and protrudes downward from the lower surface of the terminal holding portion 34. Here, a three-layer insulated wire is used for either the primary winding or the secondary winding. The left terminal holding portion is provided with a lead-out groove 42 for guiding the lead-out wire portion of the three-layer insulated wire from the winding frame portion 30 to the terminal 32 (or from the terminal to the winding frame portion).

本実施例では、引き出し溝４２は、左側の端子保持部３４の底面に左フランジ３８から左側の端子３２近傍に至るように複数本左右方向に形成されており、その途中で交差する分割溝４４によって分断されている。ここでは、分割溝４４は、左側の端子保持部３４の底面にて前端から後端に達するように設けている。なお、分割溝４４の深さは任意であってよいが、ここでは引き出し溝４２よりも若干深く形成されている。引き出し溝４２が、その途中で交差する分割溝４４で分断されることによって、一つの引き出し溝から分割溝へ、分割溝から別の引き出し溝へと前記引き出し線部分の引き出し方向を変えるエッジ部ｅが形成されることになる。このように、引き出し溝４２の途中に引き出し線部分の引き出し方向を変えるエッジ部ｅが形成されている点に、本発明の特徴がある。   In the present embodiment, the plurality of lead-out grooves 42 are formed in the left-right direction on the bottom surface of the left terminal holding portion 34 so as to extend from the left flange 38 to the vicinity of the left terminal 32. It is divided by. Here, the dividing groove 44 is provided so as to reach the rear end from the front end on the bottom surface of the terminal holding portion 34 on the left side. The depth of the dividing groove 44 may be arbitrary, but here is formed slightly deeper than the drawing groove 42. An edge portion e that changes the pulling direction of the lead wire portion from one lead groove to another split groove and from one split groove to another lead groove by dividing the lead groove 42 by a split groove 44 that intersects in the middle. Will be formed. As described above, the present invention is characterized in that the edge portion e that changes the drawing direction of the lead line portion is formed in the middle of the lead groove 42.

このようなトランスボビンには、例えば図２に示したのと同様、巻枠部３０に２本の１次巻線と１本の２次巻線とを巻装する。１次巻線には通常の単層絶縁電線（ポリウレタン被覆電線）を使用し、２次巻線には３層絶縁電線を使用する。各巻線の端末は端子まで引き出され、該端子に絡げて半田付けすることで接続が完了する。   In such a transbobbin, for example, as shown in FIG. 2, two primary windings and one secondary winding are wound around the winding frame 30. A normal single-layer insulated wire (polyurethane-coated wire) is used for the primary winding, and a three-layer insulated wire is used for the secondary winding. The end of each winding is pulled out to the terminal, and the connection is completed by tying it to the terminal and soldering.

３層絶縁電線の端末処理の例を図５に示す。３層絶縁電線の引き出し線部分ｗを太線で示してある。引き出し溝４２は、その途中で交差する分割溝４４によって分断されているから、引き出し線部分ｗは、一つの引き出し溝から分割溝へ、分割溝から別の引き出し溝へと引き回され、巻線端末が端子３２に絡げられる。従って、引き回される際に、３層絶縁電線の引き出し線部分ｗは、その絶縁被覆がエッジ部ｅに圧接した状態となる。   An example of the terminal treatment of the three-layer insulated wire is shown in FIG. The lead wire portion w of the three-layer insulated wire is indicated by a bold line. Since the drawing groove 42 is divided by the dividing groove 44 that intersects in the middle, the drawing line portion w is drawn from one drawing groove to the dividing groove and from the dividing groove to another drawing groove, A terminal is tied to the terminal 32. Therefore, when being drawn, the lead wire portion w of the three-layer insulated wire is in a state where the insulating coating is in pressure contact with the edge portion e.

端子に絡げられた巻線端末は、溶融半田に浸漬することで半田付け処理される。３層絶縁電線の巻線端末の半田付けは、ボビンを図５に示すような向きで溶融半田へ浸漬することで行う。溶融半田による熱で３層絶縁電線の被覆が溶け上がるが、エッジ部で圧接状態となっているため、熱は端子保持部へと伝わり、エッジ部ｅよりも上方（図面では右方）には溶け上がらない。つまり、半田付け時における絶縁被覆の溶け上がりは、前記エッジ部で規制されることになる。端子側からエッジ部の位置（分割溝の下側の内側面の位置）までが溶け上がり許容部分となるので、分割溝の形成位置を決めておくだけで必要な絶縁距離（１次巻線と２次巻線間の絶縁距離）を確保することができる。   The winding end entangled with the terminal is soldered by being immersed in molten solder. The winding end of the three-layer insulated wire is soldered by immersing the bobbin in the molten solder in the direction as shown in FIG. Although the coating of the three-layer insulated wire melts due to the heat from the molten solder, the heat is transferred to the terminal holding portion because it is in a pressure contact state at the edge portion, and above the edge portion e (to the right in the drawing) Does not melt. That is, the melting of the insulating coating during soldering is regulated by the edge portion. From the terminal side to the position of the edge part (the position of the inner surface on the lower side of the dividing groove) is allowed to melt, so the required insulation distance (primary winding and An insulation distance between the secondary windings) can be ensured.

本発明に係るトランスボビンの一実施例を示す説明図。Explanatory drawing which shows one Example of the transbobbin which concerns on this invention. その巻線構成を示す説明図。Explanatory drawing which shows the winding structure. その３層絶縁電線の端末処理の例を示す説明図。Explanatory drawing which shows the example of the terminal process of the three-layer insulated wire. 本発明に係るトランスボビンの他の実施例を示す説明図。Explanatory drawing which shows the other Example of the transbobbin which concerns on this invention. その３層絶縁電線の端末処理の例を示す説明図。Explanatory drawing which shows the example of the terminal process of the three-layer insulated wire.

符号の説明Explanation of symbols

１０ 巻枠部
１２ 端子
１４ 端子保持部
２２ 引き出し溝
２４ 分割溝 10 reel part 12 terminal 14 terminal holding part 22 lead-out groove 24 split groove

Claims (4)

１次巻線と２次巻線とを互いに絶縁された状態で巻装する巻枠部と、複数の端子が固定されている端子保持部とが連続一体に成形され、前記１次巻線と２次巻線の巻線端末がそれぞれ端子保持部の端子に接続される構造であって、１次巻線と２次巻線のいずれか一方に３層絶縁電線を使用し、前記端子保持部に、３層絶縁電線の引き出し線部分を巻枠部から端子に案内する引き出し溝が形成されているトランスボビンにおいて、
前記引き出し溝は、その途中で交差する分割溝によって分断され、それによって一つの引き出し溝から分割溝へ、分割溝から別の引き出し溝へと前記引き出し線部分の引き出し方向を変えるエッジ部が形成され、該エッジ部に引き出し線部分の絶縁被覆が圧接した状態で、３層絶縁電線の引き出し線部分が引き出し溝と分割溝を通って引き回されるようにしたことを特徴とするトランスボビン。 A winding frame portion for winding the primary winding and the secondary winding in a state of being insulated from each other, and a terminal holding portion to which a plurality of terminals are fixed, are integrally formed, and the primary winding The terminal of the secondary winding is connected to the terminal of the terminal holding part, and a three-layer insulated wire is used for either the primary winding or the secondary winding. In the transbobbin in which the lead groove for guiding the lead wire portion of the three-layer insulated wire from the winding frame portion to the terminal is formed,
The lead-out groove is divided by a split groove that intersects in the middle, thereby forming an edge portion that changes the lead-out direction of the lead-out line portion from one lead groove to the split groove and from the split groove to another lead groove. A transbobbin characterized in that the lead wire portion of the three-layer insulated wire is routed through the lead groove and the split groove in a state where the insulation coating of the lead wire portion is in pressure contact with the edge portion. 巻枠部の巻軸が実装面に垂直な縦型構造であり、引き出し溝が端子保持部の側面に形成されている請求項１記載のトランスボビン。 Winding shaft of the winding frame portion is a vertical structure perpendicular to the mounting surface, according to claim 1 Symbol placement transformer bobbin drawer grooves are formed on the side surface of the terminal holding portion. 巻枠部の巻軸が実装面に平行な横型構造であり、引き出し溝が端子保持部の底面に形成されている請求項１記載のトランスボビン。 Winding shaft of the winding frame portion is a horizontal structure parallel to the mounting surface, according to claim 1 Symbol placement transformer bobbin lead-out trenches are formed in the bottom surface of the terminal holding portion. 請求項１乃至３のいずれかに記載のトランスボビンを使用し、巻枠部に巻装した１次巻線と２次巻線の巻線端末を端子保持部の端子に接続し、巻枠部の内側と外側を囲むように配置される磁気コアによって１次巻線と２次巻線が磁気的に結合しているトランス。 A transformer bobbin according to any one of claims 1 to 3 , wherein a primary winding and a winding terminal of a secondary winding wound around the winding frame portion are connected to a terminal of the terminal holding portion, and the winding frame portion A transformer in which a primary winding and a secondary winding are magnetically coupled by a magnetic core arranged so as to surround an inner side and an outer side.
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