JP6528415B2

JP6528415B2 - Coil device

Info

Publication number: JP6528415B2
Application number: JP2015010314A
Authority: JP
Inventors: 裕之岩田; 信雄 ▲高▼木; 阿部　裕之; 裕之阿部; 宏二志村
Original assignee: TDK Corp
Current assignee: TDK Corp
Priority date: 2015-01-22
Filing date: 2015-01-22
Publication date: 2019-06-12
Anticipated expiration: 2035-01-22
Also published as: JP2016134589A

Description

本発明は、コイル装置に係り、さらに詳しくは、強固で確実なワイヤの継線処理が可能であり、しかも実装時の位置ズレを防止することができるコイル装置に関する。 The present invention relates to a coil device, and more particularly, to a coil device capable of performing strong and reliable wire connection processing and preventing positional deviation during mounting.

薄型化を図るために、たとえば下記の特許文献１に示すようなドラムコアと端子形状とがよく知られている。しかし、この特許文献１に示すコイル装置では、巻線用ワイヤのリード部を、端子電極に半田付けしている。 In order to reduce the thickness, for example, a drum core and a terminal shape as shown in Patent Document 1 below are well known. However, in the coil device shown in Patent Document 1, the lead portion of the winding wire is soldered to the terminal electrode.

そのため、たとえば端子電極を回路基板に実装する際の半田付けなどの際に、その熱などが原因で、巻線用ワイヤのリード部と端子電極との接続が不十分になりやすいという課題を有している。特に、装置のコンパクト化などのために、リード部と端子電極との接続箇所が、実装面に近い場合には、リード部と端子電極との接続が不十分になりやすい。 Therefore, for example, when mounting a terminal electrode on a circuit board, there is a problem that the connection between the lead portion of the winding wire and the terminal electrode tends to be insufficient due to the heat and the like. doing. In particular, when the connection portion between the lead portion and the terminal electrode is close to the mounting surface in order to make the device compact, the connection between the lead portion and the terminal electrode tends to be insufficient.

そこで、レーザ溶接や熱圧着などのように、半田よりも高い温度で、巻線用ワイヤのリード部と端子電極との接続を行うことが検討されている。ところが、レーザ溶接や熱圧着などのように、半田よりも高い温度で巻線用ワイヤのリード部と端子電極との接続を行うと、そのリード接続部には、半田フィレットは形成されない。 Therefore, it has been considered to connect the lead portion of the winding wire and the terminal electrode at a temperature higher than that of the solder, such as laser welding and thermocompression bonding. However, when the connection between the lead portion of the winding wire and the terminal electrode is performed at a temperature higher than that of the solder, such as laser welding or thermocompression bonding, a solder fillet is not formed in the lead connection portion.

そのため、端子電極の長手方向の一端にリード接続部が形成してあり、他の一端にフィレット形成部が形成してあると、リード接続部にはフィレットが形成されないことから、フィレット形成部に形成される半田により端子電極に、その長手方向の外力が作用する。その外力により、端子電極およびコイル装置が実装用回路基板に対して位置ズレすることがある。また、端子電極と実装用回路基板との間の強度が低下するなどの不都合も生じる。 Therefore, if the lead connection portion is formed at one end in the longitudinal direction of the terminal electrode and the fillet forming portion is formed at the other end, the fillet is not formed at the lead connection portion. An external force in the longitudinal direction acts on the terminal electrode by the solder that is made. The external force may cause the terminal electrode and the coil device to be misaligned with respect to the mounting circuit board. In addition, disadvantages such as a decrease in strength between the terminal electrode and the mounting circuit board also occur.

また、下記の特許文献２に示すようなコイル装置も知られているが、このコイル装置では、端子電極にはワイヤのリード端を絡げるための接続片が、コイル装置の外方に突出しており、その突出している部分が、実装機まで搬送する工程等でマウンター等の装置に接触し、その衝撃や応力により断線するおそれがあると共に、コアを破損させるおそれがある。 In addition, although a coil device as shown in Patent Document 2 below is also known, in this coil device, a connection piece for winding the lead end of the wire to the terminal electrode protrudes to the outside of the coil device. There is a possibility that the protruding portion may contact with a device such as a mounter in a process of transporting to a mounting machine or the like and the wire may be broken due to the impact or stress, and the core may be damaged.

ＷＯ２００９／０３４８６０号公報WO2009 / 034860 実用新案登録第３１７１３１５号公報Utility model registration 3171315 gazette

本発明は、このような実状に鑑みてなされ、その目的は、強固で確実なワイヤの継線処理が可能であり、しかも実装時の位置ズレを防止することができるコイル装置を提供することである。 The present invention has been made in view of such a real situation, and its object is to provide a coil device capable of performing strong and reliable wire connection processing and preventing positional deviation at the time of mounting. is there.

上記目的を達成するために、本発明に係るコイル装置は、
コイルを形成するようにワイヤが巻回される巻芯部を持つ磁性コアと、
前記巻芯部の巻軸方向端部に形成してある鍔部の巻軸方向外側端面に取り付けられる端子電極と、を有するコイル装置であって、
前記端子電極は、
前記鍔部の巻軸方向外側端面に接触する取付片と、
前記取付片の長手方向の一端から、前記鍔部の第１軸方向側面に沿って一体的に立ち上げられる継線用立上片と、
前記継線用立上片の上端側に一体的に形成され、前記ワイヤのリード部が接続される接続片と、
前記取付片の長手方向に交差する短手方向の一端から、前記鍔部の第２軸方向側面に沿って一体的に立ち上げられるフィレット形成片と、を有し、
前記フィレット形成片に形成される予定の半田フィレットの溶融温度以上の温度で前記ワイヤのリード部が前記接続片に接続してある。 In order to achieve the above object, a coil device according to the present invention is:
A magnetic core having a winding core on which a wire is wound to form a coil;
A coil device comprising: a terminal electrode attached to a winding axial direction outer end face of a collar portion formed at a winding axial direction end portion of the winding core portion;
The terminal electrode is
A mounting piece that contacts the winding axial direction outer end face of the flange portion;
A connecting wire rising piece integrally raised along the first axial side surface of the collar from one longitudinal end of the mounting piece;
A connecting piece which is integrally formed on the upper end side of the connecting wire rising piece and to which the lead portion of the wire is connected;
And a fillet-forming piece that is integrally raised along the second axial side surface of the collar from one end in the width direction intersecting the longitudinal direction of the mounting piece;
The lead portion of the wire is connected to the connection piece at a temperature higher than the melting temperature of the solder fillet to be formed on the fillet forming piece.

本発明に係るコイル装置では、レーザ溶接や熱圧着などのように、半田フィレットを形成するための温度よりも高い温度で、巻線用ワイヤのリード部と端子電極との接続を行っている。そのため、強固で確実なワイヤの継線処理が可能である。 In the coil device according to the present invention, the connection between the lead portion of the winding wire and the terminal electrode is performed at a temperature higher than the temperature for forming the solder fillet, such as laser welding and thermocompression bonding. Therefore, strong and reliable wire connection processing is possible.

また本発明のコイル装置では、取付片の長手方向に交差する短手方向の一端から、鍔部の第２軸方向側面に沿って一体的に立ち上げられるフィレット形成片に、実装時の半田フィレットが形成される。この半田フィレットにより、実装用回路基板と端子電極とが強固に連結され、端子電極の長手方向に沿っての位置ズレを効果的に防止することができる。 Further, in the coil device according to the present invention, the solder fillet at the time of mounting is mounted on the fillet forming piece which is integrally raised along the second axial direction side surface of the collar from one end in the transverse direction intersecting the longitudinal direction of the mounting piece. Is formed. By this solder fillet, the circuit board for mounting and the terminal electrode are firmly connected, and the positional deviation along the longitudinal direction of the terminal electrode can be effectively prevented.

なお、鍔部の巻軸方向外側端面には、一対の端子電極が装着されることから、端子電極の短手方向の位置ズレは、一対の端子電極にそれぞれ形成してあるフィレット形成片に形成される半田フィレットの対向する接合力の相互作用により防止される。 In addition, since a pair of terminal electrodes are attached to the winding axial direction outer end face of the collar portion, the positional deviation of the terminal electrodes in the short direction is formed on the fillet forming pieces respectively formed on the pair of terminal electrodes This is prevented by the interaction of the opposing bonding forces of the solder fillets.

好ましくは、前記ワイヤのリード部が前記接続片に接続してあるリード接続部が、前記鍔部の厚みの範囲内に形成してある。このような構成を採用することで、コイル装置のコンパクト化を実現することができる。 Preferably, a lead connection portion in which a lead portion of the wire is connected to the connection piece is formed within a range of thickness of the collar portion. By adopting such a configuration, the coil device can be made compact.

好ましくは、前記ワイヤが巻回してある巻芯部の周囲が、外装樹脂で覆われている。外装樹脂で覆われることにより、コイル部を有効に保護することができると共に、ショート不良なども抑制することができる。また、外装樹脂は、磁性体含有樹脂で構成してあることが好ましい。このように構成することで、磁性体含有の外装樹脂が、磁場の通り道となり、コイル装置の磁気特性が向上する。 Preferably, the periphery of the winding core on which the wire is wound is covered with an exterior resin. By being covered with the exterior resin, the coil portion can be effectively protected, and a short circuit can be suppressed. Moreover, it is preferable that exterior | packing resin is comprised with magnetic body containing resin. By configuring in this manner, the magnetic resin containing outer resin becomes a passage of the magnetic field, and the magnetic characteristics of the coil device are improved.

好ましくは、前記フィレット形成片の立ち上げ高さが、前記鍔部の巻軸方向厚みよりも低い。このように構成することで、コイル装置のコンパクト化を実現することができる。また、外装樹脂がフィレット形成片に付着するおそれが少なくなり、実装時の半田フィレットの形成を阻害しない。 Preferably, the rising height of the fillet forming piece is smaller than the thickness in the winding axial direction of the ridge portion. With this configuration, the coil device can be made compact. In addition, the risk of the exterior resin adhering to the fillet-forming piece is reduced, and the formation of the solder fillet during mounting is not inhibited.

好ましくは、前記鍔部の第２軸方向側面には、前記フィレット形成片が入り込む嵌合凹部が形成してある。フィレット形成片が嵌合凹部に嵌合することで、端子電極と磁性コアとの位置決めが容易になる。また、外装樹脂がフィレット形成片に付着するおそれが少なくなり、実装時の半田フィレットの形成を阻害しない。 Preferably, a fitting recess in which the fillet forming piece is inserted is formed on the second axial side surface of the collar portion. By fitting the fillet forming piece into the fitting recess, positioning of the terminal electrode and the magnetic core is facilitated. In addition, the risk of the exterior resin adhering to the fillet-forming piece is reduced, and the formation of the solder fillet during mounting is not inhibited.

好ましくは、フィレット形成片の外面は、前記嵌合凹部以外の前記第２軸方向側面と面一、または前記嵌合凹部以外の前記第２軸方向側面よりも内側に引っ込んでいる。このように構成することで、実装前のコイル装置のハンドリング特性が向上する。すなわち、フィレット形成片のエッジ部が他の部品や装置に引っかかることが無く、また他の部品や装置を傷つけることも無い。 Preferably, the outer surface of the fillet forming piece is recessed flush with the second axial side surface other than the fitting recess, or inward than the second axial side surface other than the fitting recess. By configuring in this manner, the handling characteristics of the coil device before mounting can be improved. That is, the edge portion of the fillet forming piece does not get caught on other parts or devices, nor does it damage other parts or devices.

好ましくは、前記ワイヤのリード部を仮止めするための仮止め片が、前記接続片とは別に、前記継線用立上片の上端側に一体的に形成してある。仮止め片を形成することで、レーザ溶接または熱圧着作業が容易になる。 Preferably, a temporary fixing piece for temporarily fixing the lead portion of the wire is integrally formed on the upper end side of the connecting wire rising piece separately from the connection piece. The formation of the temporary fixing piece facilitates the laser welding or thermocompression bonding operation.

好ましくは、前記鍔部の第１軸方向側面には、前記継線用立上片に対向して前記接続片の位置決めを行う立上片対向平面と、前記立上片対向平面から内側に凹んで前記形成用立上片との間に隙間を形成する端子隙間用凹部とが形成してある。このように構成することで、端子電極の接続片は、磁性コアの鍔部に対して、良好に位置決めされ、ワイヤのリード端をレーザ照射や熱圧着などにより確実に端子電極に接続することができる。 Preferably, on a first axial side surface of the collar portion, a rising piece opposing plane for positioning the connection piece in opposition to the connecting wire rising piece and a recess inwardly from the rising piece opposing plane Thus, there is formed a recess for terminal gap which forms a gap between the rising piece for formation. With this configuration, the connection piece of the terminal electrode can be well positioned with respect to the ridge portion of the magnetic core, and the lead end of the wire can be reliably connected to the terminal electrode by laser irradiation, thermocompression bonding or the like. it can.

また、端子隙間用凹部により、ワイヤのリード端を端子電極の継線部にレーザ溶接または熱圧着する際の熱衝撃が緩和され、コアの破損、割れ、欠けなどを有効に防止することができる。また、鍔部の側面と継線用立ち上げ片との間に隙間があるために、端子電極に作用する外力が吸収され、外力によるワイヤの断線やコアの破損などを有効に防止することができる。さらに、鍔部の側面と端子電極の継線用立上片との間に隙間があるために、放熱性にも優れている。 Further, the terminal gap concave portion alleviates thermal shock when laser welding or thermocompression bonding the lead end of the wire to the connecting wire portion of the terminal electrode, thereby effectively preventing breakage, breakage, chipping, etc. of the core. . In addition, since there is a gap between the side surface of the buttocks and the connecting wire rising piece, the external force acting on the terminal electrode is absorbed, and wire breakage or core breakage due to external force can be effectively prevented. it can. Furthermore, since there is a gap between the side surface of the buttocks and the connecting wire rising piece of the terminal electrode, the heat dissipation is excellent.

好ましくは、前記ワイヤのリード部の先端と前記接続片とを接続するために、前記第１軸方向側面に対して交差する方向から、前記接続片と前記ワイヤのリード部の先端に向けて、レーザ光が照射される場合に、前記レーザ光が前記磁性コアに照射されることを遮蔽する遮蔽片が、前記継線用立ち上げ片に一体に形成してある。このように構成することで、ワイヤのリード端を端子電極の継線部にレーザ溶接または熱圧着する際の熱衝撃が、遮蔽片により遮蔽され、コアの破損、割れ、欠けなどを有効に防止することができる。 Preferably, in order to connect the tip of the lead portion of the wire and the connection piece, the connection piece and the lead portion of the wire are directed from the direction intersecting the first axial direction side surface, When the laser beam is irradiated, a shielding piece for shielding the magnetic core from being irradiated with the laser beam is integrally formed on the wire connection raising piece. By this configuration, the thermal shock during laser welding or thermocompression bonding of the lead end of the wire to the connecting wire portion of the terminal electrode is shielded by the shielding piece, effectively preventing breakage, breakage, chipping, etc. of the core. can do.

図１Ａは本発明の一実施形態に係るコイル装置の斜視図である。FIG. 1A is a perspective view of a coil device according to an embodiment of the present invention. 図１Ｂは図１に示すコイル装置の正面図である。FIG. 1B is a front view of the coil device shown in FIG. 図１Ｃは図１に示すコイル装置の右側面図（左側面図は右側面図と対称）である。FIG. 1C is a right side view (the left side view is symmetrical with the right side view) of the coil device shown in FIG. 図１Ｄは図１に示すコイル装置の背面図である。FIG. 1D is a rear view of the coil device shown in FIG. 図１Ｅは図１に示すコイル装置の平面図である。FIG. 1E is a plan view of the coil device shown in FIG. 図１Ｆは図１に示すコイル装置の底面図である。FIG. 1F is a bottom view of the coil device shown in FIG. 図２は図１Ａに示すII−II線に沿う概略断面図である。FIG. 2 is a schematic cross-sectional view taken along the line II-II shown in FIG. 1A. 図３は図２に示すIII−III線に沿う断面斜視図である。FIG. 3 is a cross-sectional perspective view taken along the line III-III shown in FIG. 図４は図３に示すIV−IV線に沿う断面斜視図である。FIG. 4 is a cross-sectional perspective view taken along the line IV-IV shown in FIG. 図５は図１に示すコイル装置の分解斜視図である。FIG. 5 is an exploded perspective view of the coil device shown in FIG. 図６は図５に示す端子電極の拡大斜視図である。FIG. 6 is an enlarged perspective view of the terminal electrode shown in FIG. 図７は図１に示すコイル装置の製造過程を示す斜視図である。FIG. 7 is a perspective view showing a manufacturing process of the coil device shown in FIG. 図８は図７の続きの工程を示す斜視図である。FIG. 8 is a perspective view showing the process following FIG. 図９は図８の続きの工程を示す斜視図である。FIG. 9 is a perspective view showing the process following FIG.

以下、本発明を、図面に示す実施形態に基づき説明する。
図１Ａ〜図１Ｆに示す本発明の一実施形態に係るコイル装置２は、たとえばチョークコイル、ノイズフィルタなどとして用いられ、特に好ましくは、車載用として用いられるコイル装置である。 Hereinafter, the present invention will be described based on embodiments shown in the drawings.
The coil device 2 according to the embodiment of the present invention shown in FIGS. 1A to 1F is, for example, a coil device used as a choke coil, a noise filter, etc., and particularly preferably used as a vehicle.

このコイル装置２は、図２に示すように、磁性コアとしてのドラムコア２０を有する。ドラムコア２０を構成する磁性材料としては、金属、フェライト等の軟磁性材料が挙げられるが、特に限定されない。ドラムコア２０は、コイル部１０を構成するワイヤ１２が、コア２０の巻軸方向に沿って巻回してある巻芯部３０を有する。 The coil device 2 has a drum core 20 as a magnetic core as shown in FIG. As a magnetic material which comprises drum core 20, although soft magnetic materials, such as metal and ferrite, are mentioned, it is not limited in particular. The drum core 20 has a core portion 30 in which the wire 12 constituting the coil portion 10 is wound along the winding axis direction of the core 20.

ワイヤ１２が巻回してある巻芯部３０の周囲は、外装樹脂１５で覆われていることが好ましい。外装樹脂１５で覆われることにより、コイル部１０を有効に保護することができると共に、ショート不良なども抑制することができる。また、外装樹脂１５は、磁性体含有樹脂で構成してあることが好ましい。このように構成することで、磁性体含有の外装樹脂１５が、磁場の通り道となり、コイル装置２の磁気特性が向上する。外装樹脂１５に含まれる磁性体としては、特に限定されないが、コア２０を構成する磁性体粉と同様な磁性体粉、あるいはその他の磁性体粉が例示される。 It is preferable that the periphery of the core portion 30 around which the wire 12 is wound is covered with the exterior resin 15. By covering with the exterior resin 15, the coil portion 10 can be effectively protected, and a short circuit can be suppressed. Moreover, it is preferable that the exterior resin 15 is comprised with magnetic body containing resin. By configuring in this manner, the magnetic resin containing outer resin 15 becomes a path of the magnetic field, and the magnetic characteristics of the coil device 2 are improved. Although it does not specifically limit as a magnetic body contained in the exterior resin 15, The magnetic body powder similar to the magnetic body powder which comprises the core 20, or another magnetic body powder is illustrated.

ワイヤ１２としては、特に限定されず、たとえば銅などで構成される平角線、丸線、撚り線、リッツ線、編組線などの導電性芯線、あるいはこれらの導電性芯線を絶縁被覆してあるワイヤなどを用いることができる。具体的には、ＡＩＷ（ポリイミドワイヤ）、ＵＥＷ（ポリウレタンワイヤ）、ＵＥＷ、ＵＳＴＣなどの公知の巻線を用いることができる。ワイヤ１２の線径は、特に限定されず、たとえば０．１〜０．５ｍｍである。 The wire 12 is not particularly limited, and for example, a conductive wire such as a flat wire made of copper or the like, a round wire, a stranded wire, a litz wire, a braided wire, or a wire insulatingly coated with such conductive wire. Etc. can be used. Specifically, known windings such as AIW (polyimide wire), UEW (polyurethane wire), UEW, and USTC can be used. The wire diameter of the wire 12 is not particularly limited, and is, for example, 0.1 to 0.5 mm.

巻芯部３０の巻軸方向（Ｚ軸方向）の両端部には、それぞれ第１鍔部４０および第２鍔部５０が一体的に形成してある。これらの第１鍔部４０および第２鍔部５０は、巻芯部３０に対して、Ｘ−Ｙ軸平面に突出している。なお、Ｘ軸、Ｙ軸およびＺ軸は、相互に垂直であり、Ｚ軸は、巻き軸の軸方向に一致している。 A first collar 40 and a second collar 50 are integrally formed at both ends of the winding core 30 in the winding axis direction (Z-axis direction). The first collar portion 40 and the second collar portion 50 protrude with respect to the winding core portion 30 in the XY axis plane. The X-axis, the Y-axis and the Z-axis are perpendicular to one another, and the Z-axis coincides with the axial direction of the winding axis.

巻芯部３０の横断面（Ｘ−Ｙ軸平面の断面）は、特に限定されず、正方形断面、長方形断面、円形断面、あるいは、その他の断面形状であっても良いが、本実施形態では、図３に示すように、略円形状となっている。 The cross section (cross section of the X-Y axis plane) of the winding core 30 is not particularly limited, and may be a square cross section, a rectangular cross section, a circular cross section, or any other cross sectional shape. As shown in FIG. 3, it has a substantially circular shape.

図２に示すように、第２鍔部５０は、第２軸方向外側端面５２と、その反対側に位置する第２軸方向内面５３とを有する。第２軸方向内面５３に、コイル部１０のＺ軸方向上端が位置するようになっている。なお、図２では、ワイヤ１２を巻芯部３０の回りに二重巻きしてコイル部１０が形成してあるが、巻き層数は、特に限定されず、２重巻以上に巻回してあっても良い。また、ワイヤ１２の巻き方も特に限定されない。 As shown in FIG. 2, the second flange 50 has a second axially outer end surface 52 and a second axially inner surface 53 located on the opposite side. The Z axis direction upper end of the coil portion 10 is positioned on the second axial direction inner surface 53. In FIG. 2, the coil 12 is formed by double winding the wire 12 around the winding core 30, but the number of winding layers is not particularly limited. It is good. Further, the way of winding the wire 12 is not particularly limited.

本実施形態では、図１Ｆに示すように、第１鍔部４０と第２鍔部５０との平面形状が、相互に異なり、第２鍔部５０の外形サイズが、第１鍔部４０の外形サイズよりも大きい。第２鍔部５０の具体的な平面形状は、特に限定されないが、本実施形態では、図１Ｅに示すように、全体として四角形状を有し、４つの角部に、それぞれＲ部５４が形成してある。Ｒ部５４は、図５に示すドラムコア２０の成形時に、第１鍔部４０、第２鍔部５０および巻芯部３０と共に一体に形成されるが、一体成形後に、切削加工または研磨加工などにより形成されても良い。 In the present embodiment, as shown in FIG. 1F, the planar shapes of the first collar portion 40 and the second collar portion 50 are different from each other, and the external size of the second collar portion 50 is the outer shape of the first collar portion 40. Larger than the size. The specific planar shape of the second flange 50 is not particularly limited, but in the present embodiment, as shown in FIG. 1E, the second flange 50 has a square shape as a whole, and the R portions 54 are formed at four corner portions. Yes. The R portion 54 is integrally formed with the first collar portion 40, the second collar portion 50, and the winding core portion 30 at the time of molding of the drum core 20 shown in FIG. It may be formed.

第２鍔部５０の平面形状は、図１Ｅに示すように、第２鍔部５０の第２軸方向外側端面５２からＺ軸方向にドラムコア２０を見た場合には、第１鍔部４０は第２鍔部５０の内側に位置して見えなくなっている形状である。 When the drum core 20 is viewed in the Z-axis direction from the second axial direction outer end surface 52 of the second flange 50 as shown in FIG. It is a shape which is located inside the 2nd collar part 50, and has become invisible.

図２に示すように、第１鍔部４０は、巻軸方向外側端面４２と、その反対側に位置する巻軸方向内面４３とを有する。巻軸方向内面４３に、コイル部１０のＺ軸方向下端が位置するようになっている。第１鍔部４０の巻軸方向外側端面４２におけるＹ軸方向の両端には、第１端子電極６０および第２端子電極７０が接着剤などにより接着してある。 As shown in FIG. 2, the first collar portion 40 has a winding axial direction outer end surface 42 and a winding axial direction inner surface 43 located on the opposite side. The lower end of the coil portion 10 in the Z-axis direction is positioned on the winding axial inner surface 43. A first terminal electrode 60 and a second terminal electrode 70 are bonded by an adhesive or the like to both ends in the Y axis direction of the winding axial direction outer end face 42 of the first collar portion 40.

第１端子電極６０および第２端子電極７０は、それぞれＸ軸に対称な形状を有し、その詳細については後述するが、それらは、たとえばタフピッチ鋼、リン青銅、黄銅、鉄、ニッケルなどの導電性金属で構成してある。 Each of the first terminal electrode 60 and the second terminal electrode 70 has a shape symmetrical about the X axis, and the details thereof will be described later, for example, they are conductive such as tough pitch steel, phosphor bronze, brass, iron, nickel, etc. It is made of metal.

第１鍔部４０の具体的な平面形状は、特に限定されないが、本実施形態では、図１Ｆおよび図４に示すように、Ｘ−Ｙ軸平面において第２鍔部５０と重心位置が略同じ（巻芯部３０とも略同じ）形状である。しかも、この第１鍔部４０は、４つの角部において、第２鍔部５０の４つの角部に比較して大きく凹んでいる切り欠き４４を有している形状である。 Although the specific planar shape of the first flange portion 40 is not particularly limited, in the present embodiment, as shown in FIGS. 1F and 4, the position of the center of gravity of the second ridge portion 50 is substantially the same as that of the second ridge portion 50 in the XY plane. (It is substantially the same as the winding core 30). Moreover, the first ridge portion 40 has a shape in which the four corner portions have notches 44 that are greatly recessed compared to the four corner portions of the second ridge portion 50.

図５に示すように、第１鍔部４０のＹ軸方向の最大幅Ｌｙ１は、第２鍔部５０のＹ軸方向の最大幅Ｌｙ２と略同一またはそれ以下であり、第１鍔部４０におけるＹ軸方向の両側面４０ａは、第２鍔部５０におけるＹ軸方向の両側面５０ａと略一致またはＹ軸方向に引っ込んでいる。 As shown in FIG. 5, the maximum width Ly1 of the first ridge 40 in the Y-axis direction is substantially the same as or smaller than the maximum width Ly2 of the second ridge 50 in the Y-axis direction. Both side surfaces 40 a in the Y-axis direction substantially coincide with the side surfaces 50 a in the Y-axis direction of the second flange 50 or are recessed in the Y-axis direction.

また、第１鍔部４０のＸ軸方向の最大幅Ｌｘ１は、第２鍔部５０のＸ軸方向の最大幅Ｌｘ２と略同一またはそれ以下であり、第１鍔部４０におけるＸ軸方向の両側面４０ｂは、第２鍔部５０におけるＸ軸方向の両側面５０ｂに対して、Ｙ軸方向の中央部以外は、切り欠き部４４に対応する部分で、Ｘ軸方向に引っ込んでいる。 In addition, the maximum width Lx1 in the X-axis direction of the first ridge portion 40 is substantially the same as or smaller than the maximum width Lx2 in the X-axis direction of the second ridge portion 50, and both sides in the X-axis direction in the first ridge portion 40 The surface 40 b is recessed in the X-axis direction with respect to both side surfaces 50 b in the X-axis direction in the second flange 50 at a portion corresponding to the notch 44 except for the central portion in the Y-axis direction.

図４に示すように、第１鍔部４０におけるＸ軸方向の両側面４０ｂには、Ｙ軸方向の中央部においてＸ軸方向の外側に突出する台形状凸部４０ｂ１が形成してある。また、各凹部４４には、立上片対向平面４５ａ，４５ｂまたは反対側平面４６ａ，４６ｂと、これらから内側に凹んでいる端子隙間用凹部４７ａ，４７ｂまたは反対側凹部４８ａ，４８ｂとが形成してある。平面４５ａ，４５ｂ，４６ａ，４６ｂと、凹部４７ａ，４７ｂ，４８ａ，４８ｂと、端子電極６０，７０との関係については後述する。 As shown in FIG. 4, on both side surfaces 40 b in the X axis direction of the first flange portion 40, trapezoidal convex portions 40 b 1 are formed at the center in the Y axis direction so as to protrude outward in the X axis direction. Further, in each recess 44, rising piece opposing flat surfaces 45a, 45b or opposite side flat surfaces 46a, 46b, and terminal gap recess 47a, 47b or opposite recess 48a, 48b recessed inwardly therefrom are formed. It is The relationship among the flat surfaces 45a, 45b, 46a, 46b, the recesses 47a, 47b, 48a, 48b, and the terminal electrodes 60, 70 will be described later.

図５および図６に示すように、第１端子電極６０および第２端子電極７０は、それぞれＸ軸方向に細長い板状の取付片６１，７１を有する。これらの取付片６１，７１は、図２に示すように、第１鍔部４０の巻軸方向外側端面４２のＹ軸方向両端に対して接着剤などによりそれぞれ接着される。取付片６１，７１が接着される第１鍔部４０の外側端面４２には、取付片６１，７１の形に合わせた端子取付溝が形成してあっても良い。 As shown in FIGS. 5 and 6, the first terminal electrode 60 and the second terminal electrode 70 respectively have plate-like mounting pieces 61 and 71 elongated in the X-axis direction. As shown in FIG. 2, these attachment pieces 61 and 71 are bonded to both ends in the Y-axis direction of the winding axial direction outer end surface 42 of the first collar portion 40 with an adhesive or the like. A terminal attachment groove may be formed on the outer end surface 42 of the first flange 40 to which the attachment pieces 61 and 71 are attached, in accordance with the shape of the attachment pieces 61 and 71.

端子取付溝の溝深さは、取付片６１，７１の各厚みよりも小さくしてあることが好ましく、取付片６１，７１の底面が、巻軸方向外側端面４２よりも突き出ていることが好ましい。このようにすることで、コイル装置２の取付片６１，７１を、回路基板などの電極パターンに接続する際の実装作業が容易になる。 The groove depth of the terminal mounting groove is preferably smaller than the thickness of each of the mounting pieces 61 and 71, and the bottom surface of the mounting pieces 61 and 71 preferably protrudes beyond the winding axial direction outer end surface 42 . By doing this, the mounting operation when connecting the mounting pieces 61 and 71 of the coil device 2 to the electrode pattern of a circuit board or the like becomes easy.

図５および図６に示すように、取付片６１および取付片７１のＸ軸方向の一端には、それぞれ継線用立上片６２，７２がＺ軸方向に立ち上がるように一体に形成してあり、他端には、立上片が形成されていない。 As shown in FIGS. 5 and 6, at one end of the mounting piece 61 and the mounting piece 71 in the X-axis direction, connecting wire rising pieces 62 and 72 are integrally formed so as to rise in the Z-axis direction. The other end is not formed with a rising piece.

立上片６２，７２は、図４に示すように、第１鍔部４０の一方の側面４０ｂに形成してある立上片対向平面４５ａ，４６ａにそれぞれ接触可能になっていると共に、端子隙間用凹部４７ａ，４８ａとの間で隙間を形成する。第１鍔部４０の他方の側面４０ｂに形成してある反対側平面４５ｂ，４６ｂおよび反対側凹部４７ｂ，４８ｂでは、端子電極６０および７０は何ら係合していない。 The rising pieces 62, 72 can be brought into contact with rising piece opposing flat surfaces 45a, 46a formed on one side surface 40b of the first collar portion 40, as shown in FIG. A gap is formed between the recessed portions 47a and 48a. The terminal electrodes 60 and 70 are not engaged at all in the opposite side flat surfaces 45b and 46b and the opposite side recesses 47b and 48b formed on the other side surface 40b of the first collar portion 40.

立上片対向平面４５ａに継線用立上片６２が接触することで、第１端子電極６０は、第１鍔部４０に対してＸ軸方向の位置決めが成される。第１端子電極６０は、導電性金属で構成され、バネ性を有することが好ましい。なお、立上片対向平面４５ａと継線用立上片６２との間には、多少の隙間があっても良い。 The first terminal electrode 60 is positioned with respect to the first brim portion 40 in the X-axis direction by bringing the connecting wire rising piece 62 into contact with the rising piece opposing flat surface 45 a. The first terminal electrode 60 is preferably made of a conductive metal and preferably has a spring property. There may be some clearance between the rising piece opposing flat surface 45a and the connecting wire rising piece 62.

また同様に、立上片対向平面４６ａに立上片７２がそれぞれ接触することで、第２端子電極７０は、第１鍔部４０に対してＸ軸方向の位置決めが成される。第２端子電極７０は、導電性金属で構成され、バネ性を有することが好ましい。なお、立上片対向平面４６ａと立上片７２との間には、多少の隙間があっても良い。 Similarly, the second terminal electrode 70 is positioned in the X-axis direction with respect to the first flange portion 40 by the rising pieces 72 coming into contact with the rising piece-opposing flat surface 46 a. The second terminal electrode 70 is preferably made of a conductive metal and preferably has a spring property. There may be some clearance between the rising piece opposing flat surface 46 a and the rising piece 72.

取付片６１，７１のＸ軸方向の一端に形成してある継線用立上片６２，７２のＺ軸方向の上端には、継線部としての把持片６４，７４がそれぞれ一体に形成してある。これらの把持片６４，７４は、図３に示すように、第１鍔部４０の巻軸方向内面４３と略面一（またはそれよりもＺ軸方向下方）となるように立上片６２，７２に対して折り曲げて形成してある。 At the upper end in the Z-axis direction of connecting wire rising pieces 62 and 72 formed at one end of mounting pieces 61 and 71 in the X-axis direction, gripping pieces 64 and 74 as connecting wire portions are integrally formed, respectively. It is The gripping pieces 64 and 74 are raised pieces 62, as shown in FIG. 3, so as to be substantially flush with (or lower in the Z-axis direction than) the winding axial direction inner surface 43 of the first collar portion 40, It is bent and formed with respect to 72.

図１Ａに示すように、継線部としての把持片６４は、仮止め片６５と接続片６６とから成る。仮止め片６５は、接続片６６に対して、Ｙ軸方向の内側に位置し、第１鍔部４０のＸ軸方向側面４０ｂの中央に位置する台形状凸部４０ｂ１に近い位置に位置する。台形状凸部４０ｂ１と仮止め片６５との間には、ワイヤ１２のリード部１２ａを通すことができる隙間が形成してある。また、仮止め片６５と接続片６６との間には、Ｘ軸方向およびＺ軸方向に伸びるスリット６７が形成してある。スリット６７のＹ軸方向幅は、特に限定されないが、好ましくは０．１〜０．５ｍｍである。 As shown in FIG. 1A, a gripping piece 64 as a connecting wire portion includes a temporary fixing piece 65 and a connecting piece 66. The temporary fixing piece 65 is located inside the Y direction with respect to the connection piece 66, and is located near the trapezoidal convex portion 40b1 located at the center of the side surface 40b of the first flange 40 in the X axis direction. Between the trapezoidal convex portion 40 b 1 and the temporary fixing piece 65, a gap through which the lead portion 12 a of the wire 12 can be passed is formed. Further, a slit 67 extending in the X-axis direction and the Z-axis direction is formed between the temporary fixing piece 65 and the connection piece 66. The width in the Y-axis direction of the slit 67 is not particularly limited, but is preferably 0.1 to 0.5 mm.

仮止め片６５は、ワイヤ１２の一方の端であるリード部１２ａを、継線用立上片６２との間で挟み込み、後述するリード部１２ａのレーザ溶接前に仮固定している。接続片６６は、ワイヤ１２の一方の端であるリード部１２ａを、継線用立上片６２との間で挟み込み、しかも、そのＹ軸方向の外側に形成してあるリード接続部６８ａにて一体化され、リード部１２ａに電気的に接続してある。 The temporarily fixed piece 65 sandwiches the lead portion 12a which is one end of the wire 12 with the wire rising portion 62, and temporarily fixes the lead portion 12a described later before laser welding of the lead portion 12a. The connection piece 66 sandwiches the lead portion 12a which is one end of the wire 12 with the wire rising portion 62, and at the lead connection portion 68a formed on the outer side in the Y-axis direction. It is integrated and electrically connected to the lead 12a.

なお、図５〜図９に示すように、リード接続部６８ａが形成される前の接続片６６の先端には、その基端部よりも幅が広い幅広部６８が形成してあり、その部分が主としてリード接続部６８ａとなる。ただし、幅広部６８は、必ずしも形成しなくとも良い。また、本実施形態では、仮止め片６５のＹ軸方向幅と接続片６６のＹ軸方向幅が略等しいが、ワイヤ１２のリード部１２ａの線径などに応じて、異ならせても良い。 As shown in FIGS. 5 to 9, at the tip of the connection piece 66 before the lead connection portion 68a is formed, a wide portion 68 wider than the base end portion is formed, and that portion Is mainly the lead connection portion 68a. However, the wide portion 68 may not necessarily be formed. Further, in the present embodiment, the Y-axis direction width of the temporary fixing piece 65 and the Y-axis direction width of the connection piece 66 are substantially equal, but may be different according to the wire diameter of the lead portion 12 a of the wire 12 or the like.

また、同様に、把持片７４には、仮止め片７５と接続片７６とが形成してある。仮止め片７５と接続片７６との間には、Ｘ軸およびＺ軸方向に伸びるスリット７７が形成してある。スリット７７のＹ軸方向幅は、スリット６７と同様であるが、必ずしも同一である必要はなく異なっていても良い。 Similarly, the holding piece 74 is formed with a temporary fixing piece 75 and a connection piece 76. Between the temporary fixing piece 75 and the connecting piece 76, a slit 77 extending in the X-axis and Z-axis directions is formed. The width in the Y-axis direction of the slit 77 is the same as that of the slit 67, but may not necessarily be the same and may be different.

リード接合部７８ａが形成される前の接続片７６の先端にも、その基端部よりも幅が広い幅広部７８が形成してあり、その部分が主としてリード接続部７８ａとなる。ただし、幅広部７８は、必ずしも形成しなくとも良い。また、本実施形態では、仮止め片７５のＹ軸方向幅と接続片７６のＹ軸方向幅が略等しいが、ワイヤ１２のリード部１２ｂの線径などに応じて、異ならせても良い。 A wide portion 78 wider than its base end is also formed at the tip of the connection piece 76 before the lead bonding portion 78a is formed, and this portion mainly serves as the lead connection portion 78a. However, the wide portion 78 may not necessarily be formed. Further, in the present embodiment, the Y-axis direction width of the temporary fixing piece 75 and the Y-axis direction width of the connection piece 76 are substantially equal, but may be different according to the wire diameter of the lead portion 12 b of the wire 12 or the like.

図４にも示すように、継線用立上片６２のＹ軸方向の外側には、遮蔽片６３が一体に形成してある。遮蔽片６３は、継線用立上片６２と略同一のＺ軸方向幅を有している。また、遮蔽片６３のＹ軸方向の先端は、端子隙間用凹部４７ａに向けてＸ軸方向に曲折してあり、第１鍔部４０のＹ軸方向の一方の側面４０ａと略面一となることが好ましい。後述するような遮蔽片６３によるレーザ光の遮蔽効果と装置のコンパクト性とを両立させるためである。 As also shown in FIG. 4, a shielding piece 63 is integrally formed on the outer side in the Y-axis direction of the connecting wire rising piece 62. The shielding piece 63 has a width in the Z-axis direction substantially the same as the connecting wire rising piece 62. Further, the tip of the shielding piece 63 in the Y-axis direction is bent in the X-axis direction toward the recess 47a for the terminal gap, and is substantially flush with one side surface 40a of the first flange 40 in the Y-axis direction. Is preferred. It is for making the blocking effect of the laser beam by the shielding piece 63 which is mentioned later, and the compactness of an apparatus make compatible.

なお、遮蔽片６３のＹ軸方向の先端は、第１鍔部４０のＹ軸方向の側面４０ａよりもＹ軸方向の外側に多少突出していても良いし、Ｙ軸方向の内側に多少引っ込んでいても良い。折り曲げられている遮蔽片６３の先端は、第１鍔部４０の端子隙間用凹部４７ａの中に入り込むが、第１鍔部４０を含むドラムコア２０には接触しないようになっている。 Note that the tip of the shielding piece 63 in the Y-axis direction may slightly protrude to the outside in the Y-axis direction from the side surface 40a of the first collar portion 40 in the Y-axis direction. It may be The tip end of the shielding piece 63 which is bent enters into the terminal gap concave portion 47 a of the first collar portion 40 but does not contact the drum core 20 including the first collar portion 40.

継線用立上片７２のＹ軸方向の外側にも、遮蔽片６３と同様な遮蔽片７３が一体に形成してある。遮蔽片７３は、継線用立上片７２と略同一のＺ軸方向幅を有している。また、遮蔽片７３のＹ軸方向の先端は、端子隙間用凹部４８ａに向けてＸ軸方向に曲折してあり、第１鍔部４０のＹ軸方向の他方の側面４０ａと略面一となることが好ましい。後述するような遮蔽片７３によるレーザ光の遮蔽効果と装置のコンパクト性とを両立させるためである。 A shielding piece 73 similar to the shielding piece 63 is integrally formed on the outer side of the connecting wire rising piece 72 in the Y-axis direction. The shielding piece 73 has a width in the Z-axis direction substantially the same as the connecting wire rising piece 72. Further, the front end of the shielding piece 73 in the Y-axis direction is bent in the X-axis direction toward the terminal gap concave portion 48a, and becomes substantially flush with the other side surface 40a of the first collar portion 40 in the Y-axis direction. Is preferred. It is for making the blocking effect of the laser beam by the shielding piece 73 which is mentioned later, and the compactness of an apparatus make compatible.

なお、遮蔽片７３のＹ軸方向の先端は、第１鍔部４０のＹ軸方向の側面４０ａよりもＹ軸方向の外側に多少突出していても良いし、Ｙ軸方向の内側に多少引っ込んでいても良い。折り曲げられている遮蔽片７３の先端は、第１鍔部４０の端子隙間用凹部４８ａの中に入り込むが、第１鍔部４０を含むドラムコア２０には接触しないようになっている。 Note that the tip of the shielding piece 73 in the Y-axis direction may slightly protrude to the outside in the Y-axis direction from the side surface 40a of the first collar portion 40 in the Y-axis direction. It may be The tip end of the shielding piece 73 which is bent enters into the terminal gap concave portion 48 a of the first collar portion 40 but does not contact the drum core 20 including the first collar portion 40.

図５および図６に示すように、各端子電極６０，７０の取付片６１，７１には、それぞれＹ軸方向の外側端でＸ軸方向の途中位置に、フィレット形成片６９，７９が各々一体的に形成してある。フィレット形成片６９，７９は、第１鍔部４０におけるＹ軸方向の両側面４０ａに形成してある嵌合凹部４０ａ１にそれぞれ嵌合して接触するようになっている。なお、嵌合凹部４０ａ１は、必ずしも設けなくても良い。また、フィレット形成片６９，７９のＺ軸方向の立ち上げ高さは、第１鍔部４０のＺ軸方向厚みと略同一、またはそれよりも低いことが好ましい。 As shown in FIGS. 5 and 6, fillet forming pieces 69 and 79 are integrally formed on the mounting pieces 61 and 71 of the terminal electrodes 60 and 70 respectively at the outer end in the Y-axis direction and at a midway position in the X-axis direction. It is formed in The fillet forming pieces 69, 79 are respectively fitted in and brought into contact with fitting recesses 40a1 formed on both side surfaces 40a in the Y-axis direction of the first collar portion 40. The fitting recess 40a1 may not necessarily be provided. Further, it is preferable that the rising height in the Z-axis direction of the fillet forming pieces 69, 79 is substantially the same as or smaller than the thickness in the Z-axis direction of the first flange portion 40.

次に、図１Ａ〜図４に示すコイル装置２の製造方法について説明する。まず、図５に示すドラムコア２０を成形する。ドラムコア２０の成形方法は、特に限定されないが、圧縮成形、ＣＩＭ（セラミックインジェクションモールディング）成形、ＭＩＭ（メタルインジェクションモールディング）成形などが考えられる。成形後に焼成されて焼結体となる。 Next, a method of manufacturing the coil device 2 shown in FIGS. 1A to 4 will be described. First, the drum core 20 shown in FIG. 5 is formed. The method for forming the drum core 20 is not particularly limited, and compression molding, CIM (ceramic injection molding) molding, MIM (metal injection molding) molding, and the like can be considered. It is fired after molding to form a sintered body.

次に、ドラムコア２０の第１鍔部４０における巻軸方向外側端面４２に、第１端子電極６０および第２端子電極７０を取り付ける。なお、第１端子電極６０および第２端子電極７０は、一枚の金属板（たとえば銅板）を打ち抜き成形および折り曲げ加工することで容易に成形が可能である。端子電極６０および７０をドラムコアに取り付けた後、またはその前に、図５に示すドラムコア２０の巻芯部３０にワイヤ１２を巻回してコイル部１０を形成する。 Next, the first terminal electrode 60 and the second terminal electrode 70 are attached to the winding axial direction outer end face 42 of the first flange portion 40 of the drum core 20. The first terminal electrode 60 and the second terminal electrode 70 can be easily formed by punching and bending a single metal plate (for example, a copper plate). After or before the terminal electrodes 60 and 70 are attached to the drum core, the wire 12 is wound around the core portion 30 of the drum core 20 shown in FIG.

巻芯部３０にコイル部１０を形成した状態で、コイル部１０を構成するワイヤの両端であるリード部１２ａ，１２ｂは、図７に示すように、第１端子電極６０の把持片６４および第２端子電極７０の把持片７４のＺ軸方向下に位置させる。その状態で、次に、図８に示すように、仮止め片６５および７５のみを曲げて、各リード部１２ａ，１２ｂを、仮止め片６５および７５と立上片６２，７２との間で挟み込み、把持片６４，７４の下に仮固定する。 In a state in which the coil portion 10 is formed in the winding core portion 30, the lead portions 12a and 12b which are both ends of the wire constituting the coil portion 10 are, as shown in FIG. It is positioned below the gripping piece 74 of the two-terminal electrode 70 in the Z-axis direction. In that state, next, as shown in FIG. 8, only the temporary fixing pieces 65 and 75 are bent so that the lead portions 12 a and 12 b can be inserted between the temporary fixing pieces 65 and 75 and the rising pieces 62 and 72. It is pinched and temporarily fixed under the gripping pieces 64 and 74.

その状態で、図８に示すリード部１２ａおよび１２ｂを、Ｘ軸方向の正面側から見れば、仮止め片６５，７５からＹ軸方向の外側に伸びるリード部が、接続片６８により隠されないで見ることができる。 In that state, when the lead portions 12a and 12b shown in FIG. 8 are viewed from the front side in the X-axis direction, the lead portions extending outward from the temporary fixing pieces 65 and 75 in the Y-axis direction are not hidden by the connection piece 68 I can see it.

その状態で、各仮止め片６５，７５から突出しているリード部１２ａ，１２ｂに向けて、Ｘ軸方向の正面側から被覆層剥離用レーザ光を照射すれば、リード部１２ａ，１２ｂを構成するワイヤの外周に形成してあるポリアミドイミドなどの被覆層を剥離することができる。 In this state, when the covering layer peeling laser light is irradiated from the front side in the X-axis direction toward the lead portions 12a and 12b protruding from the temporary fixing pieces 65 and 75, the lead portions 12a and 12b are configured. A coating layer such as polyamide imide formed on the outer periphery of the wire can be peeled off.

レーザ光を照射したとしても、立上片６２，７２および遮蔽片６３，７３があるために、レーザ光は、ドラムコア２０には照射されず、ドラムコアの劣化を防止することができる。また、リード部１２ａ、１２ｂは、仮止め片６５，７５で仮固定された状態でレーザ照射されるため、ワイヤの被覆層の剥離の影響は、仮止め片６５，７５までとなり、不必要な範囲で剥離層が除去されることも無い。なお、ワイヤ１２として、被覆層を剥がす必要がないワイヤを用いている場合には、このようなレーザ照射による被覆層の剥離工程は不要となる。 Even when the laser beam is irradiated, since the rising pieces 62 and 72 and the shielding pieces 63 and 73 are present, the laser beam is not irradiated to the drum core 20, and the deterioration of the drum core can be prevented. Further, since the lead portions 12a and 12b are laser-irradiated in a state of being temporarily fixed by the temporary fixing pieces 65 and 75, the influence of the peeling of the coating layer of the wire becomes the temporary fixing pieces 65 and 75, which is unnecessary. In the range, the peeling layer is not removed either. In addition, when using the wire which does not need to peel off a coating layer as the wire 12, the peeling process of the coating layer by such laser irradiation becomes unnecessary.

次に、図９に示すように、接続片６６，７６（幅広部６８，７８含む）を折り曲げて、リード部１２ａ，１２ｂの先端部を挟み込み仮固定する。その状態では、リード部１２ａ，１２ｂの先端１２ａ１，１２ｂ１は、幅広部６８，７８のＹ軸方向外側端よりも少しはみ出しており、第１鍔部４０のＹ軸方向の側面４０ａよりもはみ出してもよい。 Next, as shown in FIG. 9, the connection pieces 66 and 76 (including the wide portions 68 and 78) are bent to sandwich and temporarily fix the leading end portions of the lead portions 12a and 12b. In that state, the tips 12a1 and 12b1 of the lead portions 12a and 12b slightly extend beyond the outer ends of the wide portions 68 and 78 in the Y-axis direction, and extend beyond the side surface 40a of the first ridge portion 40 in the Y-axis direction. It is also good.

その状態で、Ｘ軸方向の正面側から、リード部１２ａ，１２ｂの先端１２ａ１，１２ｂ１と幅広部６８、７８の一部を含む照射範囲ＬＢ（たとえば円形の照射範囲）に向けて溶接用レーザ光を照射する。その結果、図１Ｂに示すように、少なくともリード部１２ａの先端と接続片６６（幅広部６８含む）とが一体化されてリード接続部６８ａが形成される。同様に、少なくともリード部１２ｂの先端と接続片７６（幅広部７８含む）とが一体化されてリード接続部７８ａが形成される。これらのリード接続部６８ａ，７８ａのＹ軸方向外側端は、レーザ溶接の結果、第１鍔部４０のＹ軸方向側面４０ａと略面一、または、それよりもＹ軸方向に引っ込むことになる。 In that state, the laser beam for welding is directed toward the irradiation range LB (for example, a circular irradiation range) including the tips 12a1 and 12b1 of the lead portions 12a and 12b and a part of the wide portions 68 and 78 from the front side in the X axis direction. Irradiate. As a result, as shown in FIG. 1B, at least the tip of the lead portion 12a and the connection piece 66 (including the wide portion 68) are integrated to form a lead connection portion 68a. Similarly, at least the tip of the lead 12b and the connection piece 76 (including the wide portion 78) are integrated to form a lead connection 78a. As a result of laser welding, the Y-axis direction outer ends of these lead connection portions 68a and 78a are substantially flush with the Y-axis direction side surface 40a of the first collar portion 40 or recessed in the Y-axis direction from them. .

溶接用レーザ光を照射したとしても、立上片６２，７２および遮蔽片６３，７３があるために、レーザ光は、ドラムコア２０には照射されず、ドラムコアの劣化を防止することができる。レーザ溶接に際しては、図９に示すように、レーザ光が出射する方向から見て、リード部１２ａ，１２ｂの手前側に、幅広部６８，７８が位置することが好ましい。 Even when the laser beam for welding is irradiated, since the rising pieces 62, 72 and the shielding pieces 63, 73 are present, the laser beam is not irradiated to the drum core 20, and the deterioration of the drum core can be prevented. In laser welding, as shown in FIG. 9, it is preferable that the wide portions 68, 78 be positioned on the front side of the lead portions 12a, 12b when viewed from the direction in which the laser light is emitted.

このように構成することで、レーザ光の照射により、リード部１２ａ，１２ｂの先端１２ａ１，１２ｂ１がまず溶けてＹ軸方向の内側に縮み、幅広部６８，７８と一体化されて図１Ｂに示す球形に近い溶接玉から成るリード接続部６８ａ，７８ａを作りやすい。なお、溶接玉の外径は、特に限定されないが、好ましくは０．３５〜０．４５ｍｍである。溶接玉から成るリード接合部６８ａ，７８ａは、そのＸ軸方向の背後に位置する遮蔽片６３，７３および立上片６２，７２とは一体化されないで離れていることが好ましいが、多少接触していても良い。 With this configuration, the tips 12a1 and 12b1 of the lead portions 12a and 12b are first melted and shrunk inside in the Y-axis direction by laser irradiation, and integrated with the wide portions 68 and 78, as shown in FIG. 1B. It is easy to make lead connection parts 68a and 78a which consist of near spherical welding balls. In addition, although the outer diameter of a welding ball is not specifically limited, Preferably it is 0.35-0.45 mm. It is preferable that the lead joint portions 68a and 78a consisting of weld balls are not integrated but separated from the shielding pieces 63 and 73 and the rising pieces 62 and 72 located behind in the X-axis direction, but they slightly contact May be

なお、図では、リード部１２ａ，１２ｂの先端と幅広部６８，７８とのみが一体化されてリード接続部６８ａ，７８ａが形成されているように描いてある。レーザ照射のエネルギー量によっては、リード部１２ａ，１２ｂの先端と接続片６６，７６とが一体となって玉状のリード接続部６８ａ，７８ａとなる場合もある。また、場合によっては、仮止め片６５，７５も、玉状のリード接続部６８ａ，７８ａに、それぞれ一体化されてもよい。 In the drawing, only the tips of the lead portions 12a and 12b and the wide portions 68 and 78 are integrated to draw the lead connecting portions 68a and 78a. Depending on the amount of energy of laser irradiation, the tips of the lead portions 12a and 12b and the connection pieces 66 and 76 may be integrated to form ball-like lead connection portions 68a and 78a. Also, in some cases, the temporary fixing pieces 65, 75 may be integrated with the ball-shaped lead connecting portions 68a, 78a, respectively.

本実施形態に係るコイル装置２では、図４に示すように、第１鍔部４０のＸ軸方向の一方の側面４０ｂには、端子電極６０，７０の立上片６２，７２に対向して継線部の位置決めを行う立上片対向平面４５ａ，４６ａが形成してある。このため、端子電極６０，７０の継線部の一部である把持片６４，７４は、ドラムコアの第１鍔部４０に対して、良好に位置決めされ、把持片におけるワイヤ１２のリード部１２ａ，１２ｂをレーザ照射などにより確実に端子電極６０，７０に接続することができる。 In the coil device 2 according to the present embodiment, as shown in FIG. 4, the one side surface 40 b of the first ridge portion 40 in the X-axis direction faces the rising pieces 62, 72 of the terminal electrodes 60, 70. Rising piece opposing flat surfaces 45a and 46a for positioning the wire connection portion are formed. For this reason, the gripping pieces 64 and 74 which are a part of the connecting wire portions of the terminal electrodes 60 and 70 are well positioned with respect to the first flange portion 40 of the drum core, and the lead portions 12a, 12 of the wire 12 in the gripping pieces 12b can be reliably connected to the terminal electrodes 60 and 70 by laser irradiation or the like.

また、本実施形態に係るコイル装置２では、第１鍔部４０の側面４０ｂには、立上片対向平面４５ａ，４６ａから内側に凹んで立上片６２，７２（遮蔽片６３，７３を含む）との間に隙間を形成する端子隙間用凹部４７ａ，４８ａが、立上片対向平面４５ａ，４６ａと共に形成してある。このため、ワイヤ１２のリード部１２ａ，１２ｂを端子電極６０，７０の継線部にレーザ溶接する際の熱衝撃が緩和され、コア２０の破損、割れ、欠けなどを有効に防止することができる。また、第１鍔部４０の側面４０ｂと端子電極の立上片６２，７２との間に隙間があるために、端子電極６０，７０に作用する外力が吸収され、外力によるワイヤ１２の断線やコア２０の破損などを有効に防止することができる。さらに、第１鍔部４０の側面４０ｂと端子電極の立上片６２，７２との間に隙間があるために、継線部の放熱性にも優れている。 Further, in the coil device 2 according to the present embodiment, the side pieces 40b of the first collar portion 40 are raised inward from the rising piece opposing flat surfaces 45a, 46a and include the rising pieces 62, 72 (including the shielding pieces 63, 73). Terminal clearance recesses 47a, 48a are formed together with the rising piece opposing flat surfaces 45a, 46a. For this reason, the thermal shock at the time of laser welding the lead portions 12a and 12b of the wire 12 to the junctions of the terminal electrodes 60 and 70 is alleviated, and breakage, cracking, chipping and the like of the core 20 can be effectively prevented. . In addition, since there is a gap between the side surface 40b of the first flange portion 40 and the rising pieces 62 and 72 of the terminal electrode, external force acting on the terminal electrodes 60 and 70 is absorbed, and disconnection of the wire 12 due to external force Damage to the core 20 can be effectively prevented. Furthermore, since there is a gap between the side surface 40b of the first flange portion 40 and the rising pieces 62 and 72 of the terminal electrode, the heat dissipation of the wire connection portion is also excellent.

また本実施形態では、第２鍔部５０の外形サイズが、第１鍔部４０の外形サイズよりも大きいことで、第１鍔部４０の角部に、端子電極６０，７０の立上片６２，７２を位置させるための凹部４４（図４参照）を作りやすくなる。 Further, in the present embodiment, since the external size of the second flange 50 is larger than the external size of the first flange 40, the rising pieces 62 of the terminal electrodes 60 and 70 at the corners of the first flange 40. , 72 can be easily made.

すなわち、本実施形態では、鍔部４０，５０の大きさを維持してインダクタンスを低下させることなく、第２鍔部５０に対する端子金具６０，７０の突出量を必要最小限にすることが可能であり、コイル装置の搬送途中において、端子金具６０，７０やリード接続部６８ａ，７８ａが、実装装置などに衝突するおそれが少なくなる。 That is, in the present embodiment, it is possible to minimize the amount of protrusion of the terminal fitting 60, 70 with respect to the second flange 50 without maintaining the size of the flanges 40, 50 to reduce the inductance. The possibility of the terminal fittings 60 and 70 and the lead connecting portions 68a and 78a colliding with the mounting device and the like decreases while the coil device is being transported.

また本実施形態では、把持片６４，７４には、スリット６７，７７が形成してある。スリット６７，７７が形成してあることで、放熱性が良好となる。また、仮止め片６５，７５と接続片６６，７６との間にスリット６７，７７があることで、溶接玉状のリード接続部６８ａ，７８ａの大きさの制御が容易であり、接続に都合の良いサイズのリード接続部６８ａ，７８ａを容易に形成することができる。 Further, in the present embodiment, slits 67 and 77 are formed in the gripping pieces 64 and 74. By forming the slits 67 and 77, the heat dissipation becomes good. Further, the slits 67 and 77 are provided between the temporarily fixed pieces 65 and 75 and the connection pieces 66 and 76, so that control of the size of the weld ball-shaped lead connection portions 68a and 78a is easy, which is convenient for connection. Good sized lead connections 68a, 78a can be easily formed.

さらに本実施形態では、レーザ溶接（１０００°Ｃ以上の温度）などのように、半田フィレットを形成するための温度（２３０〜２８０°Ｃ）よりも高い温度で、巻線用ワイヤ１２のリード部１２ａ，１２ｂと端子電極６０，７０との接続を行っている。そのため、強固で確実なワイヤ１２の継線処理が可能である。 Furthermore, in the present embodiment, the lead portion of the winding wire 12 at a temperature higher than the temperature (230 to 280 ° C.) for forming the solder fillet, such as laser welding (temperature of 1000 ° C. or more), etc. Connections between 12a and 12b and the terminal electrodes 60 and 70 are made. Therefore, strong and reliable wire connection processing of the wire 12 is possible.

また本実施形態のコイル装置２では、取付片６１，７１のＸ軸方向の一方の端部にのみ、立上片６２，７２が形成してあり、他方の端部には、立上片が形成されていない。このため、従来技術に比較して、端子電極６０，７０のＸ軸方向に沿っての位置ズレを効果的に防止することができる。 Further, in the coil device 2 of the present embodiment, the rising pieces 62, 72 are formed only at one end of the mounting pieces 61, 71 in the X-axis direction, and the rising piece is formed at the other end. Not formed. Therefore, it is possible to effectively prevent the positional deviation of the terminal electrodes 60 and 70 along the X-axis direction, as compared with the prior art.

ちなみに従来では、他方の端部にも立上片が形成されて、その部分に半田フィレットが形成される。そして、レーザ溶接による接続部６８ａ，７８ａのために立上片６２，７２には半田フィレットが形成されない。そのため、従来では、他方の端部に形成してある立上片に付着する半田フィレットによる外力のために、端子電極６０，７０と共にコイル装置２の全体を、回路基板に対してＸ軸方向に位置ずれさせるおそれがあった。 Incidentally, in the prior art, a rising piece is also formed at the other end, and a solder fillet is formed in that portion. The solder fillets are not formed on the rising pieces 62 and 72 for the connection parts 68a and 78a by laser welding. Therefore, in the prior art, the entire coil device 2 together with the terminal electrodes 60 and 70 in the X axis direction with respect to the circuit board due to the external force by the solder fillet attached to the rising piece formed at the other end There was a risk of misalignment.

これに対して、本実施形態では、取付片６１，７１のＸ軸方向の他方の端部にには、立上片が形成されていない。その代わりに、取付片６１，７１の長手方向（Ｘ軸方向）に交差する短手方向（Ｙ軸方向）の一端から、第１鍔部４０のＹ軸方向側面４０ａに沿って一体的に立ち上げられるフィレット形成片６９，７９に、実装時の半田フィレットが形成される。この半田フィレットにより、実装用回路基板（図示省略）と端子電極６０，７０とが強固に連結され、端子電極６０，７０のＸ軸方向に沿っての位置ズレを効果的に防止することができる。 On the other hand, in the present embodiment, the rising pieces are not formed at the other end of the mounting pieces 61 and 71 in the X-axis direction. Instead, they stand integrally along the Y-axis direction side surface 40a of the first flange 40 from one end in the short direction (Y-axis direction) intersecting the longitudinal direction (X-axis direction) of the mounting pieces 61 and 71. Solder fillets at the time of mounting are formed on the fillet-forming pieces 69, 79 to be raised. By this solder fillet, the mounting circuit board (not shown) and the terminal electrodes 60 and 70 are firmly connected, and the positional deviation of the terminal electrodes 60 and 70 along the X-axis direction can be effectively prevented. .

また、これらのフィレット形成片６９，７９を、各端子電極６０および７０に設けることで、次に示す作用効果も期待できる。すなわち、コイル装置２を、たとえば回路基板に実装する際に、各端子６０および７０の下面に付着しているハンダが、フィレット形成片６９，７９の外表面にも付着し、Ｚ軸方向の上から見た場合に、第２鍔部５０に隠れること無く、ハンダの付き具合を確認することができる。 Further, by providing the fillet forming pieces 69, 79 on the respective terminal electrodes 60 and 70, the following effects can be expected. That is, when the coil device 2 is mounted on, for example, a circuit board, the solder attached to the lower surface of each of the terminals 60 and 70 also adheres to the outer surface of the fillet forming pieces 69 and 79, and When viewed from the side, it is possible to confirm the degree of attachment of the solder without hiding in the second ridge portion 50.

なお、第１鍔部４０の巻方向外側端面４２には、一対の端子電極６０，７０が装着されることから、端子電極のＹ方向の位置ズレは、一対の端子電極６０，７０にそれぞれ形成してあるフィレット形成片６９，７９に形成される半田フィレットの対向する接合力の相互作用により防止される。 In addition, since the pair of terminal electrodes 60 and 70 are attached to the winding direction outer end face 42 of the first collar portion 40, the positional deviation of the terminal electrodes in the Y direction is formed on the pair of terminal electrodes 60 and 70 respectively. This is prevented by the interaction of the opposing bonding forces of the solder fillets formed on the fillet forming pieces 69, 79.

また本実施形態では、ワイヤ１２のリード部１２ａ，１２ｂが接続片６６，７６に接続してあるリード接続部６８ａ，７８ａが、第１鍔部４０の厚みの範囲内に形成してある。このような構成を採用することで、コイル装置２のコンパクト化を実現することができる。 Further, in the present embodiment, the lead connection portions 68a and 78a in which the lead portions 12a and 12b of the wire 12 are connected to the connection pieces 66 and 76 are formed within the range of the thickness of the first flange portion 40. By adopting such a configuration, the coil device 2 can be made compact.

さらに本実施形態では、フィレット形成片６９，７９の立ち上げ高さが、第１鍔部４０の巻軸方向厚みよりも低い。このように構成することで、コイル装置２のコンパクト化を実現することができる。また、外装樹脂１５がフィレット形成片６９，７９に付着するおそれが少なくなり、実装時の半田フィレットの形成を阻害しない。 Furthermore, in the present embodiment, the rising height of the fillet forming pieces 69, 79 is smaller than the thickness in the winding axial direction of the first flange portion 40. With such a configuration, the coil device 2 can be made compact. In addition, the possibility of the exterior resin 15 adhering to the fillet forming pieces 69, 79 is reduced, and the formation of the solder fillet during mounting is not inhibited.

また、本実施形態では、第１鍔部４０のＹ軸方向側面４０ａには、フィレット形成片６９，７９が入り込む嵌合凹部４０ａ１が形成してある。フィレット形成片６９，７９８嵌合凹部４０ａ１に嵌合することで、端子電極６０，７０と磁性コア２０との位置決めが容易になる。また、外装樹脂１５がフィレット形成片６９，７９に付着するおそれが少なくなり、実装時の半田フィレットの形成を阻害しない。 Further, in the present embodiment, in the Y-axis direction side surface 40a of the first collar portion 40, a fitting recess 40a1 into which the fillet forming pieces 69, 79 are formed is formed. The positioning of the terminal electrodes 60 and 70 and the magnetic core 20 is facilitated by fitting the fillet forming pieces 69 and 798 into the fitting recesses 40 a 1. In addition, the possibility of the exterior resin 15 adhering to the fillet forming pieces 69, 79 is reduced, and the formation of the solder fillet during mounting is not inhibited.

フィレット形成片６９，７９の外面は、嵌合凹部４０ａ１以外のＹ軸方向側面４０ａと面一、または嵌合凹部４０ａ１以外のＹ軸方向側面４０ａよりも内側に引っ込んでいる。このように構成することで、実装前のコイル装置２のハンドリング特性が向上する。すなわち、フィレット形成片６９，７９のエッジ部が他の部品や装置に引っかかることが無く、また他の部品や装置を傷つけることも無い。 The outer surfaces of the fillet forming pieces 69, 79 are recessed flush with the Y-axis direction side surface 40a other than the fitting recess 40a1 or inside the Y-axis direction side surface 40a other than the fitting recess 40a1. By configuring in this manner, the handling characteristics of the coil device 2 before mounting can be improved. That is, the edge portions of the fillet forming pieces 69 and 79 do not get caught on other parts and devices, and the other parts and devices are not damaged.

図９に示すように、ワイヤ１２のリード部１２ａ，１２ｂの先端１２ａ１，１２ｂ１と接続片６６，７６の幅広部６８，７８とを接続するために、Ｘ軸方向からレーザ光ＬＢが照射される。リード部１２ａ，１２ｂの先端１２ａ１，１２ｂ１と接続片６６，７６の幅広部６８，７８との背後には、遮蔽片６３，７３が配置してある。そのため、レーザ光ＬＢは、遮蔽片６３，７３がにより遮蔽される。したがって、レーザ溶接時の熱衝撃が、遮蔽片６３，７３により遮蔽され、コア２０の破損、割れ、欠けなどを有効に防止することができる。 As shown in FIG. 9, in order to connect the tips 12a1 and 12b1 of the lead portions 12a and 12b of the wire 12 and the wide portions 68 and 78 of the connection pieces 66 and 76, the laser beam LB is irradiated from the X axis direction. . Behind the tips 12a1 and 12b1 of the lead portions 12a and 12b and the wide portions 68 and 78 of the connection pieces 66 and 76, shielding pieces 63 and 73 are disposed. Therefore, the shielding pieces 63 and 73 are shielded by the laser beam LB. Therefore, the thermal shock at the time of laser welding is shielded by the shielding pieces 63 and 73, and breakage, cracking, chipping and the like of the core 20 can be effectively prevented.

なお、本発明は、上述した実施形態に限定されるものではなく、本発明の範囲内で種々に改変することができる。 The present invention is not limited to the above-described embodiment, and can be variously modified within the scope of the present invention.

たとえば、レーザ溶接のみでなく、熱圧着（３００°Ｃ以上）などのように、半田フィレットを形成するための温度（２３０〜２８０°Ｃ）よりも高い温度で、巻線用ワイヤ１２のリード部１２ａ，１２ｂと端子電極６０，７０との接続を行ってもよい。 For example, the lead portion of the winding wire 12 at a temperature higher than the temperature (230 to 280 ° C.) for forming the solder fillet, such as not only laser welding but also thermocompression bonding (300 ° C. or more). The terminals 12a and 12b may be connected to the terminal electrodes 60 and 70, respectively.

上述した実施形態では、図５および図７に示すように、レーザ溶接前の段階では、仮止め片６５，７５と接続片６８，７８が開いており、その後に、図８に示すように、仮止め片６５，７５を折り曲げ、さらにその後に、接続片６８，７８を折り曲げている。しかしながら、図６に示すように、仮止め片６５，７５と接続片６８，７８は、最初から折り曲げてあっても良い。 In the embodiment described above, as shown in FIGS. 5 and 7, the temporary fixing pieces 65, 75 and the connecting pieces 68, 78 are opened before the laser welding, and then, as shown in FIG. The temporary fixing pieces 65, 75 are bent, and thereafter, the connection pieces 68, 78 are bent. However, as shown in FIG. 6, the temporary fixing pieces 65, 75 and the connecting pieces 68, 78 may be bent from the beginning.

すなわち、少なくとも仮止め片６５，７５は、ワイヤ１２のリード部１２ａ，１２ｂをＺ軸方向下側から収容するようにＺ軸方向の上側凸に予め曲げておいてもよい。接続片６８，７８に関しても同様である。 That is, at least the temporary fixing pieces 65, 75 may be bent in advance in the upper convex in the Z-axis direction so as to accommodate the lead portions 12a, 12b of the wire 12 from the lower side in the Z-axis direction. The same applies to the connection pieces 68 and 78.

また上述した実施形態の端子電極６０および７０において、ドラムコア２０と接触する表面は、ドラムコアとの接着性を向上させるために、メッキ膜が形成されていないことが好ましいが、回路基板との半田接合面となる裏面には、半田との接合性を向上させるために、錫メッキが成されていても良い。 Further, in the terminal electrodes 60 and 70 of the embodiment described above, it is preferable that a plating film is not formed on the surface in contact with the drum core 20 in order to improve the adhesion with the drum core. The back surface to be the surface may be tin-plated in order to improve the adhesion to the solder.

２… コイル装置
１０… コイル部
１２… ワイヤ
１５… 外装樹脂
２０… ドラムコア
３０… 巻芯部
４０… 第１鍔部
４０ａ，４０ｂ… 側面
４２… 巻軸方向外側端面
４３… 巻軸方向内面
４４… 切り欠き
４５ａ，４６ａ… 立上片対向平面
４７ａ，４８ａ… 端子隙間用凹部
４５ｂ，４６ｂ… 反対側平面
４７ｂ，４８ｂ… 反対側凹部
５０… 第２鍔部
５２… 第２軸方向外側端面
５３… 第２軸方向内面
５４… Ｒ部
６０… 第１端子電極
６１，７１… 取付片
６２，７２… 継線用立上片
６３，７３… 遮蔽片
６４，７４… 把持片
６５，７５… 仮止め片
６６，７６… 接続片
６７，７７… スリット
６８，７８… 幅広部
６８ａ，７８ａ… リード接続部
６９，７９… フィレット形成片 DESCRIPTION OF SYMBOLS 2 ... Coil apparatus 10 ... Coil part 12 ... Wire 15 ... Exterior resin 20 ... Drum core 30 ... Core part 40 ... 1st collar part 40a, 40b ... Side surface 42 ... Winding axis direction outer end face 43 ... Winding axis direction inner surface 44 ... Cutting Notches 45a, 46a ... Rising piece facing flat surfaces 47a, 48a ... Terminal gap concave portions 45b, 46b ... Reverse side flat surfaces 47b, 48b ... Reverse side concave portions 50 ... Second ridge 52 ... Second axial direction outer end face 53 ... Second Axial inner surface 54 R section 60 First terminal electrode 61, 71 Mounting piece 62, 72 Connection rising end piece 63, 73 Shielding piece 64, 74 Holding piece 65, 75 Temporary fixing piece 66, 76 ... connection piece 67, 77 ... slit 68, 78 ... wide part 68a, 78a ... lead connection part 69, 79 ... fillet forming piece

Claims

A magnetic core having a winding core on which a wire is wound to form a coil;
A coil device comprising: a terminal electrode attached to a winding axial direction outer end face of a collar portion formed at a winding axial direction end portion of the winding core portion;
The terminal electrode is
A mounting piece that contacts the winding axial direction outer end face of the flange portion;
A connecting wire rising piece integrally raised along the first axial side surface of the collar from one longitudinal end of the mounting piece;
A connecting piece which is integrally formed on the upper end side of the connecting wire rising piece and to which the lead portion of the wire is connected;
And a fillet-forming piece that is integrally raised along the second axial side surface of the collar from one end in the width direction intersecting the longitudinal direction of the mounting piece;
The wire lead is connected to the connection piece at a temperature above the melting temperature of the solder fillet to be formed in the fillet forming piece;
The lead portion of the wire is drawn out so as to be substantially orthogonal to the longitudinal direction of the attachment piece along the second axial direction, and the lead portion extending along the second axial direction is for raising the connection wire. Coil device inserted between a piece and the connection piece.

The coil device according to claim 1, wherein a lead connection portion in which a lead portion of the wire is connected to the connection piece is formed within a range of thickness of the collar portion.

The coil device according to claim 1 or 2, wherein a periphery of a winding core on which the wire is wound is covered with an exterior resin.

The coil device according to any one of claims 1 to 3, wherein a rising height of the fillet forming piece is lower than a thickness in a winding axial direction of the collar portion.

The coil device according to any one of claims 1 to 4, wherein a fitting recess into which the fillet forming piece is inserted is formed on the second axial direction side surface of the collar portion.

The temporary fixing piece for temporarily fixing the lead portion of the wire is integrally formed on the upper end side of the connecting wire rising piece separately from the connection piece. Coil device as described.

On the first axial side surface of the flange portion, a rising piece facing flat surface for positioning the connection piece in opposition to the winding rising piece, and the inner surface from the rising piece facing flat surface to be recessed inwardly The coil device according to any one of claims 1 to 6, wherein a terminal gap recess that forms a gap between the wire rising piece and the wire rising piece is formed.

In order to connect the tip of the lead portion of the wire and the connection piece, laser light is directed toward the tip of the connection piece and the lead portion of the wire from the direction intersecting the first axial direction side surface The shielding piece according to any one of claims 1 to 7, wherein a shielding piece that shields the magnetic core from being irradiated with the laser beam when being irradiated is integrally formed on the winding wire raising piece. Coil device.

A magnetic core having a winding core on which a wire is wound to form a coil;
A coil device comprising: a terminal electrode attached to a winding axial direction outer end face of a collar portion formed at a winding axial direction end portion of the winding core portion;
The terminal electrode is
A mounting piece that contacts the winding axial direction outer end face of the flange portion;
A connecting wire rising piece integrally raised along the first axial side surface of the collar from one longitudinal end of the mounting piece;
A connecting piece which is integrally formed on the upper end side of the connecting wire rising piece and to which the lead portion of the wire is connected;
And a fillet-forming piece that is integrally raised along the second axial side surface of the collar from one end in the width direction intersecting the longitudinal direction of the mounting piece;
The wire lead is connected to the connection piece at a temperature above the melting temperature of the solder fillet to be formed in the fillet forming piece;
On the first axial side surface of the flange portion, a rising piece facing flat surface for positioning the connection piece in opposition to the winding rising piece, and the inner surface from the rising piece facing flat surface to be recessed inwardly A coil device having a terminal gap recess that forms a gap between itself and a wire rising piece.

A magnetic core having a winding core on which a wire is wound to form a coil;
A coil device comprising: a terminal electrode attached to a winding axial direction outer end face of a collar portion formed at a winding axial direction end portion of the winding core portion;
The terminal electrode is
A mounting piece that contacts the winding axial direction outer end face of the flange portion;
A connecting wire rising piece integrally raised along the first axial side surface of the collar from one longitudinal end of the mounting piece;
A connecting piece which is integrally formed on the upper end side of the connecting wire rising piece and to which the lead portion of the wire is connected;
And a fillet-forming piece that is integrally raised along the second axial side surface of the collar from one end in the width direction intersecting the longitudinal direction of the mounting piece;
The wire lead is connected to the connection piece at a temperature above the melting temperature of the solder fillet to be formed in the fillet forming piece;
In order to connect the tip of the lead portion of the wire and the connection piece, laser light is directed toward the tip of the connection piece and the lead portion of the wire from the direction intersecting the first axial direction side surface A coil device in which a shielding piece which shields that the laser light is irradiated to the magnetic core when being irradiated is integrally formed on the winding wire rising piece.