CN108428539A - Coil device - Google Patents

Abstract

The coil device that the present invention, which provides, to be minimized and leakage characteristics are stablized.Coil device has：Skeleton (20)；The first coil portion (31) being made of the electric conductor of plate；Positioned at the position different from first coil portion (31), the second coil part (32) being made of the electric conductor of plate；Intermediate coil portion (33) between these first coil portion (31) and the second coil part (32).Skeleton (20) has：Intermediate skeleton (23), the first skeleton (21), the second skeleton (22).Intermediate coil portion (33) with the first middle flange portion (231) and the second middle flange portion (232) in a manner of being close to wound on intermediate canister portion (236), in such a way that the second middle flange portion (232) is abutted with the opposite side surfaces for the second coil part (32) for being connected to second end flange part (220), the second canister portion (226) is combined in the second end of intermediate canister portion (236).

Description

Coil device

Technical field

The present invention relates to the coil devices that can function properly as the isallobaric device of such as leakage transformer.

Background technology

Coil device is used for various electric equipment products with various uses.For example, will be from electric vehicle or hybrid vehicle The high voltage drop that provides of high-tension battery be pressed into low-voltage, and the DC/DC that the low-voltage is provided to other electrical equipments is converted In device, using coil device, used generally as the isallobaric device of leakage transformer.

As an example of coil device, it can be cited for example that the coil device indicated in following patent documents 1.Patent The coil device indicated in document 1 has primary coil and in a pair of of the secondary coil (busbar) for sandwiching primary coil up and down. In the coil device, the secondary side skeleton that insert-molding is carried out with secondary coil sandwiches the primary side seam for being wound with primary coil Frame.

In the coil device constituted in this way, the interval in the spool direction between primary coil and secondary coil is by primary side The sum of insert-molding thickness of the thickness of the flange part of skeleton and secondary side skeleton determines.Accordingly, it is difficult to by primary coil and The interval in the spool direction between secondary coil is set to be constant thickness, and leakage characteristics are difficult to stablize.

In addition, in the coil device, in order to make the side of sidewall portion of arc-shaped on secondary side skeleton, in the side of sidewall portion Inside setting incorporating section, and primary side skeleton is stored in the incorporating section, the outer diameter of secondary side skeleton becomes larger, and it is tired that there is also miniaturizations The problem of difficulty etc..

Existing technical literature

Patent document

Patent document 1：Japanese Unexamined Patent Publication 2013-89787 bulletins

Invention content

The present invention is given this fact and completes, it is intended that provide one kind can minimize and The coil device that leakage characteristics are stablized.

In order to achieve the above objectives, coil device according to the present invention has：

Skeleton；

First coil portion is made of the electric conductor of plate；

Second coil part is located at the position different from the first coil portion, is made of the electric conductor of plate；

Intermediate coil portion, between these first coil portion and the second coil part,

The skeleton has：

Intermediate skeleton has and is wound with the intermediate canister portion in the intermediate coil portion, in the axial direction of the intermediate canister portion First end and second end are respectively formed with the first middle flange portion and the second middle flange portion；

There is first skeleton the first canister portion for being combined in the first end, first end flange part to be formed in described first Canister portion；

There is second skeleton the second canister portion for being combined in the second end, second end flange part to be formed in described second Canister portion,

The intermediate coil portion is (preferably tight to be contacted with first middle flange portion and second middle flange portion Patch) mode be wound in the intermediate canister portion,

With the opposite side of second middle flange portion and second coil part for being connected to the second end flange part The mode that surface abuts has second canister portion in the second end combination of the intermediate canister portion.

Skeleton in the present invention is constituted by integrally combining the first skeleton, intermediate skeleton and the second skeleton.Moreover, Intermediate skeleton is not accommodated in instead of the inside of the second skeleton, the second canister portion is combined in the second end of intermediate canister portion, makes described Second middle flange portion abuts (being preferably close to) in the opposite of the second coil part for abutting (being preferably close to) with second end flange part Side surface.

In order to which intermediate coil portion is wound in intermediate skeleton in a manner of being contacted with the second middle flange portion, it is wound in intermedium The intermediate coil portion of frame and the second coil part of the second skeleton is configured at the distance of the thickness corresponding to the second middle flange portion It separates and configures.In the intermediate skeleton of molding, it can relatively accurately control the thickness of the second middle flange portion and be molded.

In addition, if the second skeleton configured in a manner of the downside as gravity direction, and combination is intermediate on it Skeleton and the first skeleton, then first coil portion be configured on the first middle flange portion, using the dead weight of first coil portion, Below one coil part (being preferably close to) is abutted with the upper surface of the first middle flange portion.In addition, intermediate coil portion with in first Between abut the mode of (being preferably close to) below flange part and be wound in intermediate skeleton.

Therefore, it is wound in the intermediate coil portion of intermediate skeleton and is configured at the first coil portion of the first skeleton to correspond to the The distance of the thickness of one middle flange portion is separated and is configured.In the intermediate skeleton of molding, can relatively accurately control in first Between flange part thickness and be molded.

In this way by after the first skeleton, intermediate skeleton and the combination of the second skeleton, it is bonded if these skeletons for example used The fixing means such as agent are fixed, then the distance in the spool direction of first coil portion, intermediate coil portion and the second coil part corresponds to The thickness of each flange part is maintained certain respectively.Thus, it is easy to improve the coupling between these coil parts, and can realize The coil device that leakage characteristics are stablized.

In addition, due to being not necessarily to carry out insert-molding etc., the height in the spool direction of skeleton can be reduced.Again Have, intermediate skeleton is not accommodated in the inside of the second skeleton, has the second canister portion in the second end combination of intermediate canister portion Structure, therefore the radial size of the second skeleton can be reduced.It is also identical as the second skeleton about the first skeleton.

Further more, since the first coil portion and the second coil part are made of the electric conductor of plate, big electricity can be made Stream flows through first coil portion and the second coil part.

Second coil part can also be with the shape of general toroidal plate.Alternatively, it is also possible to convex in the second end The cross section of the inner face of edge and the peripheral surface of second canister portion is formed with and is supported with the inner circumferential side of second coil part The positioning region connect.By using such composition, the inner circumferential side of the second coil part is abutted with positioning region, can prevent the second line Position deviation occurs in the radial direction for circle portion.

It is preferred that the positioning region is formed in the circumferential lateral surface of stage portion, second middle flange portion is connected to the step The step surface in portion.It is preferred that the axial length of the stage portion is and the plate thickness of second coil part length below on an equal basis Degree.By adopting such structure, the second middle flange portion is reliably tightly attached to the second coil part.

It is cut it is preferred that being formed with the centre cut out with defined depth in the second end side of the inner circumferential side of the intermediate canister portion Oral area is formed with the engaging protuberances engaged with the central incision portion in the first end side of second canister portion, and the engaging is convex Portion engages with the central incision portion, to be formed between the front end face of the engaging protuberances and the bottom surface in the central incision portion There is gap.By adopting such structure, the second middle flange portion is reliably tightly attached to the second coil part.

It is preferred that the engaging protuberances are sticked in the central incision portion, so that the inner circumferential side of the intermediate canister portion and described The circumferential lateral surface of engaging protuberances is opposite.By adopting such structure, the circumferential lateral surface of engaging protuberances is acted as positioning surface With, can prevent intermediate canister portion occur in the radial direction position deviation.

It can also be configured to be formed with and can match between the first end flange part and first middle flange portion The mode for setting the space of the first coil portion has first canister portion in the first end combination of the intermediate canister portion.

Alternatively, it is also possible to be abutted in first middle flange portion with first end flange part abutting (being preferably close to) The first coil portion opposite side surfaces mode, the intermediate canister portion first end combination have first canister portion.

The first coil portion and second coil part constitute the either side in primary coil or secondary coil, described Intermediate coil portion constitutes any other party in primary coil or secondary coil.

Description of the drawings

Figure 1A is the stereogram as the transformer of the coil device involved by an embodiment of the invention；

Figure 1B is stereogram when unloading lower casing and bottom plate from transformer shown in figure 1A；

Fig. 2 is the exploded perspective view of transformer shown in figure 1A；

Fig. 3 is the main portion sectional view along the transformer of III-III lines shown in figure 1A；

Fig. 4 is the main portion sectional view along the skeleton of IV-IV lines shown in figure 1A；

Fig. 5 A are the stereograms of the skeleton in transformer shown in figure 1A；

Fig. 5 B are the exploded perspective views of skeleton shown in Fig. 5 A；

Fig. 5 C are the main portion sectional views of skeleton shown in Fig. 5 A；

Fig. 5 D are the main portion sectional views of the variation of skeleton shown in Fig. 5 A；

Fig. 5 E are the detailed main portion sectional views of skeleton shown in Fig. 5 A；

Fig. 5 F are stereograms when insulating boot etc. to be installed on to skeleton shown in Fig. 5 A；

Fig. 6 A are the stereograms of the coil part in transformer shown in figure 1A；

Fig. 6 B are the exploded perspective views of coil part shown in Fig. 6 A；

Fig. 6 C are the stereograms of the variation of the first coil portion and the second coil part in coil part shown in Fig. 6 A；

Fig. 7 is the circuit diagram for the equivalent circuit for indicating transformer shown in figure 1A.

The explanation of symbol

10 ... transformers

20 ... skeletons

21 ... first skeletons

210 ... first end flange parts

211 ... cover holding sections

216 ... first canister portions

217 ... first engaging protuberances

218 ... first engaging concavities

219 ... first positioning regions

219a ... first steps portion

22 ... second skeletons

220 ... second end flange parts

226 ... second canister portions

227 ... second engaging protuberances

228 ... second engaging concavities

229 ... second positioning regions

229a ... second steps portion

23 ... intermediate skeletons

231 ... first middle flange portions

231a ... the first lead locking notch

232 ... second middle flange portions

233 ... third middle flange portions

233a ... the second lead locking notch

233b ... coiling insert notch

236 ... intermediate canister portions

The first central incisions of 237a ... portion

The first intermediate convex shaped parts of 238a ...

The second central incisions of 237b ... portion

The second intermediate convex shaped parts of 238b ...

239 ... interfix portions

239a ... intermediate steps portion

24 ... first terminal platforms

241 ... the first side wall portions

242 ... positioning surfaces

25 ... Second terminal platforms

251 ... the second side wall portions

252 ... fasteners

253 ... engaging protrusion portions

26 ... skeleton foots

30 ... coil parts

31 ... first coil portion

32 ... second coil parts

33 ... intermediate coil portions

37 ... intermediate coilings

37a, 37b ... leading part

371a, 371b ... lead rising portions

Interconnecting piece between 372 ... coils

38,39 ... busbares

381a, 381b, 391a, 391b ... portion of terminal

383,393 ... opening portions

384a, 384b, 394a, 394b ... plate rising portions

40a, 40b ... magnetic core

44a, 44b ... base portion

The middle foot of 46a, 46b ...

48a, 48b ... batter portion

50 ... covers

52 ... cover main body portions

54 ... hooking sheets

56 ... batter guide pins

58 ... holding sections

60 ... draw around irdome

61 ... holding sections

70 ... pedestals

80 ... terminals

90 ... shells

91 ... bottom plates

92 ... sleeve parts

100 ... heat transmission resins.

Specific implementation mode

Hereinafter, the present invention will be described for embodiment based on ... shown in the drawings.

As the coil device involved by present embodiment shown in figure 1A transformer 10 for will from electric vehicle or The high voltage drop that the high-tension battery of hybrid vehicle provides is pressed into low-voltage, and provides the low-voltage to other electrical equipments DC/DC converters etc..

As shown in Fig. 2, the transformer 10 has skeleton 20, magnetic core 40a and 40b, cover 50, draws around irdome 60, terminal 80, they are accommodated in internal shell 90, bottom plate 91.In addition, in the accompanying drawings, X-axis, Y-axis and Z axis are mutually perpendicular to, Z axis corresponds to In the height (thickness) of transformer 10.In the present embodiment, the lower section of the Z-direction of transformer 10 becomes the setting of transformer Face.In addition, Y-axis is consistent with the long side direction of base portion 44a, 44b of magnetic core 40a, 40b.Further more, the long side of X-axis and skeleton 20 Direction is consistent.

In the present embodiment, bottom plate 91 is constituted in the bottom peristome of shell 90 with the methods of riveting or bonding installation The shell 90 that top opens.Bottom plate 91 is preferably made of metals such as the excellent aluminum bronze of thermal diffusivity, iron, but can also by PPS, PET, The compositions such as PBT.Since the lower face of the Z-direction of following magnetic cores 40 is contacted with bottom plate 91, so bottom plate 91 is preferably by dissipating Hot excellent material is constituted.It can also be the lower section of shell 90 be via bottom plate 91 or to be mounted directly cooling tube, cooling fin etc. cold But device.

In the quadrangle of bottom plate 91, it is formed with portion sleeve (boss) 92.In sleeve part 92, such as it is formed with bolt hole.Shell 90 consist of metal in itself, but can also be made of synthetic resin etc..Alternatively, it is also possible to by casting forming of aluminium etc. by bottom plate 91 and shell 90 it is integrally formed.By the shell entirety that consists of metal, thermal diffusivity further increases.

As shown in figure 3, being filled with heat transmission resin 100 in the inside of shell 90.As heat transmission resin, do not limit especially It is fixed, but the resin that preferably such as pyroconductivity is 0.5~5, the thermal diffusivity of preferably 1~3W/mK is excellent.It is excellent as thermal diffusivity Different resin, such as have silicone resinoid, polyurethane based resin, epoxylite etc., but wherein preferred silicone resin, polyurethane Resin.In addition, in order to improve thermal diffusivity, the high filler of heat conductivity can also be filled in resin.

In addition, the preferred Xiao A hardness of heat transmission resin of present embodiment is 100 hereinafter, preferably 60 or less.This be by In, though magnetic core 40a, 40b or skeleton 20 produced because of heat deformation if can absorb its deformation, will not make magnetic core 40a, 40b generates excessive stress.As such resin, illustration has filling (Potting) resin.

As shown in Figures 3 and 4, the coil 30 for being mounted on skeleton 20 has the along the central shaft (Z-direction) of skeleton 20 One coil part 31, the second coil part 32, the intermediate coil portion 33 between these first coil portion 31 and the second coil part 32. That is, in a manner of sandwiching the 3rd coil part 33 by first coil portion 31 and the second coil part 32, each coil part 31~33 is along above-mentioned Central shaft arrangement.

Intermediate coil portion 33 is made of intermediate coiling 37, and first coil portion 31 and the second coil part 32 are respectively by having conduction Property plate electric conductor (in the present embodiment, busbar) 38 and 39 constitute.By constituting each coil part 31,32 by busbar, High current can be made to flow through each coil part 31,32.

In the present embodiment, intermediate coiling 37 constitutes primary coil, and busbar 38,39 constitutes secondary coil.That is, such as Fig. 7 (a) shown in, the intermediate coil portion 33 being made of intermediate coiling 37 is as primary side, the first coil portion being made of busbar 38,39 31 and second coil part 32 become primary side, form transformer therebetween as a result,.

In the present embodiment, in primary coil, compared with secondary coil, high voltage is acted on, in secondary coil, compared with Low low-voltage is acted on.As the range of the voltage acted in primary coil, for example, 300~500V, as The range for the voltage that secondary coil is acted on is 12~14V.

Intermediate coiling 37 can also be made of single line or is made of twisted wire, be preferably made of inner hereby line etc..Intermediate coiling 37 outer diameter is not particularly limited, preferably the range of 1~3mm.Additionally, it is preferred that being formed with insulating film in intermediate coiling 37.

Leading part 37a, 37b shown in figure 1A are the both ends of Fig. 3 and intermediate coiling 37 shown in Fig. 4.As shown in Figure 1A, In each end of leading part 37a, 37b, such as terminal 80 is constituted by metal terminal and is connected using welding etc., the both ends of coiling 37 It is electrically connected with terminal 80.

As shown in Fig. 6 A and Fig. 6 B, busbar 38,39 is by having the opening 383,393 of generally elliptical shape in center substantially The shape of annular plate-like (substantially C letter stencils shape) is constituted.Busbar 38,39 is to add the tablet being made of conductive materials such as copper coins punching After work, each portion's Bending Processing is fabricated.In addition, the shape of busbar 38,39 is not limited to general toroidal plate (substantially C letter stencils Shape), can also be the other shapes such as elliptical shape or quadrilateral shape.In addition, in the present embodiment, 38,39 points of busbar It is not made of, can also be made of multiturn a circle.

It is formed with first end sub-portion 381a in one end of busbar 38, second end sub-portion 381b is formed in the other end.In addition, It is formed with first end sub-portion 391a in one end of busbar 39, second end sub-portion 391b is formed in the other end.As shown in Figure 6A, female The first end sub-portion 381a of line 38 is connect with the second end sub-portion 391a of busbar 39 in a manner of overlapping each other in Z-direction, female The second end sub-portion 381b of line 38 is connect with the second end sub-portion 391b of busbar 39 in a manner of overlapping each other in Z-direction.By This, busbar 38,39 is concatenated, and is overlapped on the same axis in a manner of 383,393 connection of opening.In addition, as shown in Fig. 7 (A), first Coil part 31 and the second coil part 32 are connected in parallel.

As shown in Figure 5 B, integrally formed at the upper surface of the X-direction both ends of the first skeleton 21 (first end flange part 210) There are first terminal platform 24 and Second terminal platform 25.Each terminal board 24,25 has side of sidewall portion 241,251.Side of sidewall portion 241,251 removes The side for leading to portion of terminal 381a, 381b, 391a, 391b of leading part 37a, 37b and busbar 38,39, to surround terminal board 24, the mode of 25 periphery is formed.It is formed on first terminal platform 24 and is supported with each plate rising portions 384a, 384b of busbar 38 It connects, carries out the positioning surface 242 of their positioning.

On each positioning surface 242, each other and the second plate with first plate rising portions 384a, 394a for being erected in Z-direction State closer to each other shape rising portions leading part 384b, 394b is directed into the first end side.On Second terminal platform 25, in side wall Two outer end walls of the Y direction in portion 251 are formed with engaging protrusion portion 253.To the function in engaging protrusion portion 253 followed by retouching It states.

In addition, being formed with a pair of of fastener 252 on Second terminal platform 25.As illustrated in figure 5f, in a pair of of fastener 252, First leading part 37a, the 37b erected in the Z-axis direction by lead rising portions 371a, 371b is outside from the inside of Y direction Side is wound, and is directed into the outside of X-direction.

By the way that leading part 37a, 37b are locked on a pair of of fastener 252, leading part is located at shown in Fig. 6 A and Fig. 6 B The intermediate coil portion 33 that the intermediate coiling 37 of the centre of 37a, 37b is constituted will not loosely be locked and prevent its debatching. Under the state, leading part 37a, 37b can be drawn to the direction far from coil 30.

As shown in Figure 1B, in the top of the Z-direction of terminal board 25, extraction is installed in a covered manner around irdome 60. It says in further detail, hole 61 is formed with around the side at the Y direction both ends of irdome 60 drawing, by making the hole 61 and in terminal The engaging protrusion portion 253 formed on platform 25 engages, and can be mounted on terminal board 25 around irdome 60 by drawing.Thereby, it is possible to prevent Leading part 37a, 37b unnecessarily expose to the top of terminal board 25.

As shown in Fig. 2, magnetic core 40a, 40b is in the present embodiment identical shape, there is section on the sections Z-Y E word shapes constitute so-called E cores.In addition, the mode of magnetic core 40a, 40b is not limited to mode shown in Fig. 2, can also be Made of magnetic core 40a, 40b is parallelly cut off along figure chain lines (substantial middle position of Y direction) and XZ planes Divide core.Alternatively, magnetic core can also be by magnetic core 40a, 40b along the straight line intersected with figure chain lines (X-direction Substantial middle position) with YZ planes parallelly cut off made of divide core.

Configuring the magnetic core 40a in the upside of Z-direction has the base portion 44a extended to Y direction, from the Y of base portion 44a The both ends of axis direction to Z-direction a pair of of batter portion 48a outstanding, between these batter portions 48a from the mediad of Y direction Z-direction middle foot 46a outstanding.Configuring the magnetic core 40b in the downside of Z-direction has the base portion extended to Y direction 44b, from the both ends of the Y direction of base portion 44b to Z-direction a pair of batter portion 48b outstanding, between these batter portions 48b From the mediad Z-direction of Y direction middle foot 46b outstanding.

Middle foot 46a is inserted into the inside of the core foot through hole 21a of skeleton 20 from the top of Z-direction.Equally, middle foot 46b is inserted into the inside of the core foot through hole 21a of skeleton 20 from the lower section of Z-direction, in the core foot inside of through hole 21a, These front ends are constituted in a manner of with the preceding end in contact of middle foot 46a.

Alternatively, it is also possible to be middle foot 46b front end in the inside of core foot through hole 21a, with middle foot 46a's Between front end, by across defined gap it is opposite in a manner of constituted.In this way, by forming gap, it can be according to the width in gap Adjust leakage characteristics.

Middle foot 46a and middle foot 46b by with core foot with the inner peripheral surface shape of through hole 21a it is consistent in a manner of have substantially Elliptic cylindrical shape, but its shape is not particularly limited, and can also cooperatively change with the shape of core foot through hole 21a.Separately Outside, batter portion 48a, 48b has an inside concave curve surface shape coordinated with the peripheral surface shape of skeleton main body 21, outside have with The parallel plane of X-Z plane.In the present embodiment, the material of each core 40a, 40b enumerate the soft magnetisms material such as metal, ferrite Material, but be not particularly limited.

Between the peripheral surface of the inner peripheral surface and skeleton 20 (each skeleton 21,22,23) of batter portion 48a, 48b, it is respectively configured There is cover 50.The cover main body 52 of cover 50 has the shape of the periphery of the skeleton 20 between terminal board 24 and 25 of covering skeleton 20 Shape.At the both ends of the Z-direction of cover main body 52, it is formed with from cover main body 52 towards skeleton 20 to generally vertical direction bending Hooking sheet 54.As shown in figure 3, being formed in a pair of of hooking sheet 54 of the both sides of the Z-direction of cover main body 52 with by the first skeleton The Z-direction of second end flange part 220 in the upper surface of Z-direction of first end flange part 210 in 21 and the second skeleton The mode sandwiched below is installed.

In addition, as shown in Fig. 2, outside the both ends of the X-direction of cover main body 52, it has been integrally formed along Z-direction The batter guide pin 56 of extension.The inner face of batter portion 48a, 48b and the cover main body 52 between a pair of of batter guide pin 56 Outside contacts, and the movement of the X-direction of batter portion 48a, 48b is limited by a pair of of batter guide pin 56.These cover 50 by with The insulating components such as 20 same plastics of skeleton or metal are constituted.

As illustrated in figure 5f, it is formed in the hook-shaped holding section 58 of the inside of the hooking sheet 54 of the upside of cover 50 detachably It is embedded in the hook-shaped cover holding section 211 for being formed in the upper surface of first skeleton 21.

As shown in Figure 5 B, the skeleton 20 of present embodiment is divided into the first skeleton 21, intermediate skeleton 23, the second skeleton by three 22, these each skeletons 21,22,23 are combined into one and are constituted.

These skeletons 21,22,23 are made of plastics such as such as PPS, PET, PBT, LCP, nylon respectively, but can also be by it He is constituted insulating component.But in the present embodiment, as skeleton 21,22,23, such as preferably by pyroconductivity up to 1W/ The plastics of mK or more are constituted, and can also be made of such as PPS, nylon etc..

Intermediate skeleton 23 has is wound with the intermediate canister portion 236 in intermediate coil portion 33 in periphery.In the axis of intermediate canister portion 236 To first end (in the present embodiment, Z-direction upper end) and second end (in the present embodiment, Z-direction lower end) Each end, the first middle flange portion 231 and the second middle flange portion 232 to the foreign side of radial direction in a manner of extending, in Z axis side It is integrally formed substantially in parallel with X/Y plane at predetermined intervals upwards.

In addition, in the intermediate cylinder between the Z-direction of the first middle flange portion 231 and the second middle flange portion 232 The peripheral surface in portion 236, third middle flange portion 233 by diameter it is outstanding outward in a manner of formed.In the present embodiment, with each The equal mode of the thickness of the Z-direction of flange part 231,232,233, constitutes each flange part 231,232,233.Among first The upper surface of flange part 231 is configured with first coil portion 31.

Pass through the third middle flange portion formed between the first middle flange portion 231 and the second middle flange portion 232 233, as shown in Figure 5 C, between these flange parts, zoning S1 and S2 are sequentially formed with above Z-direction.In zoning S1 And S2 is wound with intermediate coiling 37.In addition, the quantity of middle flange portion 233 and zoning S1 and S2 are not particularly limited.

As shown in figure 4, in the present embodiment, in zoning S1 and S2, the continuously multiturns such as each five circle of intermediate coiling 37 It is wound, and constitutes intermediate coil portion 33.In the present embodiment, play will be wound on first end for third middle flange portion 233 The intermediate coil portion 33 of side and the effect separated in Z-direction wound on the intermediate coil portion 33 of the second end side.

As shown in Figure 5 C, be wound in zoning S1, S2 for the intermediate coiling 37 for constituting intermediate coil portion 33 along Z axis Zoning width T3 is preferably set at Z-direction into the width of an intermediate coiling 37.This is because, being easy to carry out α windings. But zoning width T3 can also be set as the width in Z-direction into two or more intermediate coilings 37.In addition, at this In embodiment, the zoning width T3 in each zoning S1 and S2 is preferred all identical, but can also be slightly different.

In addition, the length H1 of the radial direction of each flange part 231~233 is set as into one or more (one layer or more) The height of intermediate coiling 37 in the present embodiment is preferably set to that the height of 3~8 layers of coiling can be wound.Each flange part 231~233 length H1 is preferred all identical, but can also be different.

In the present embodiment, it is wound for α wound on the winding method of the intermediate coiling 37 of zoning S1 and S2, intermediate coiling 37 from interconnecting piece 372 between coil shown in Fig. 6 B to each zoning S1 and S2 shown in Fig. 5 C by by by be started winding, and by It is drawn out to each leading part 37a, 37b shown in Fig. 5 F.

Here, being illustrated to α windings.Such as to skeleton 20 shown in Fig. 5 A, when the intermediate coiling 37 of α windings, first, Interconnecting piece 372 between the coil of intermediate coiling 37 shown in Fig. 6 B is passed to the coiling of third middle flange portion 233 shown in Fig. 5 B Insert notch 233b.

Then, as shown in figure 4, the top half of the Z-direction of intermediate coiling 37 is in the inside of zoning S1, with multilayer (figure In be 5 layers) be wound in the periphery of intermediate skeleton 23.Meanwhile the lower half portion of intermediate coiling 37 is in the inside of zoning S2, Xiang Yuqu The opposite direction (or can also be same direction) of coiling direction in S1 is drawn, with multilaminate coiled in the periphery of intermediate skeleton 20. In addition, these operations can also be carried out using automatic coil winder.

As shown in fig. 5e, it in the first end side of the inner circumferential side of intermediate canister portion 236, is formed with defined depth to second The the first central incision portion 237a cut out is held, the second end side in the inner circumferential side of intermediate canister portion 236 is formed with defined depth Spend the second central incision portion 237b cut out to first end.Each central incision portion 237a, 237b is along the inner circumferential for winding canister portion 236 Side is formed.

As shown in Figure 5 B, deep with the Z-direction of notch near the X-direction both ends of each central incision portion 237a, 237b The degree mode smaller than other parts, is formed with the first intermediate intermediate convex shaped part 238b of convex shaped part 238a and second.Shown in Fig. 5 B Example in, the circumferential width of the first intermediate intermediate convex shaped part 238b of convex shaped part 238a and second is respectively different, but can also phase Deng.

As shown in fig. 5e, the length of the Z-direction of central incision portion 237a is (away from following the upper surface of interfix portions 239 Length) LC1a be preferably intermediate canister portion 236 Z-direction length 1/10~4/10, more preferably 1/3 or so.In in addition, Between notch 237b Z-direction length (away from the length below the second middle flange portion 232) LC1b be intermediate canister portion 236 Z-direction length 1/10~4/10 more preferably 1/3 or so.

The cross section with intermediate canister portion 236 on the upper surface of first middle flange portion 231, along intermediate canister portion 236 Periphery be formed with the interfix portion 239 abutted with the inner circumferential side of first coil portion 31.Interfix portion 239 has opposite In the intermediate step portion 239a of the substantially vertical standing of the upper surface of the first middle flange portion 231.By being set as such structure, When the upper surface of one middle flange portion 231 configures first coil portion 31, inner circumferential side and the intermediate step portion of first coil portion 31 239a (and following first step portion 219a) is abutted, and can be prevented first coil portion 31 from position occurs to radial direction and be deviateed.

As shown in Figure 5 B, in 25 side of Second terminal platform (X-axis negative direction side) of the first middle flange portion 231, it is formed with One lead locking notch 231a is formed with the in 25 side of Second terminal platform (X-axis negative direction side) of third middle flange portion 233 The locking of two leads notch 233a and coiling insert notch 233b.In each lead locking notch 231a, 233a, locking has figure Lead rising portions 371a, 371b of each leading part 37a, 37b shown in 5F, to be easy to be formed lead rising portions 371a, 371b. In addition, the notch 233b of coiling insert shown in Fig. 5 B by intermediate coiling 37 as shown in figure 4, wind (α volumes) in intermediate canister portion 236 Periphery when, for inserting (between leading part 37a, 37b substantial middle of interconnecting piece 372 between coil as shown in Figure 6B The center portion of intermediate coiling 37).

As shown in fig. 5e, the first skeleton 21 has first canister portion 216 of the combination in the first end of intermediate canister portion 236. One canister portion 216, first end flange part 210 is formed with X/Y plane substantially in parallel, so that first end flange part 210 is to partly The foreign side in diameter direction extends.It is formed in the second end side of the inner circumferential side of the first canister portion 216 and engages with central incision portion 237a The first engaging protuberances 217.First engaging protuberances 217 to second end side snap-latch piece outstanding from constituting.

As shown in Figure 5 B, the first engaging protuberances 217 are formed along the periphery of the first canister portion 216.In the first engaging protuberances 217 X-direction both ends near, by the prominent width of the Z-direction of the second end side than other parts it is small in a manner of, be formed with first Concavity 218.First concavity 218 engages with the first intermediate convex shaped part 238a, the first concavity in the first engaging protuberances 217 Part engaging other than the first intermediate convex shaped part 238a in part and central incision portion 237a other than 218.First as a result, Portion 216 is combined in the first end of intermediate canister portion 236, below first end flange part 210 and first middle flange portion 231 Being formed between above can be with the space A1 of first coil portion 31 shown in configuration diagram 5C.In the present embodiment, first coil The distance between portion 31 and intermediate coil portion 33 (shortest distance) with by the thickness of their the first middle flange portion 231 being spaced apart It spends equal.

As shown in fig. 5e, the cross section with the first canister portion 216 below first end flange part 210, along first The periphery of canister portion 216 forms the first positioning region 219 abutted with the inner circumferential side of first coil portion 31.First positioning region 219 has There is the first step portion 219a relative to substantially vertical decline below first end flange part 210.By being set as such structure, When the upper surface of first middle flange portion 231 is configured with first coil portion 31, the inner circumferential side of first coil portion 31 and First Rank portion 219a (and above-mentioned intermediate step portion 239a) is abutted, therefore can prevent first coil portion 31 from position occurs to radial direction Set deviation.

In the present embodiment, the Z-direction length (height away from the upper surface of interfix portion 239 of the first engaging protuberances 217 Degree) LE1 is smaller than the Z-direction length LC1a of central incision portion 237a.Therefore, first is combined in the first end of intermediate canister portion 236 When canister portion 216, abutted with the upper surface of interfix portion 239 below the first positioning region 219, before the first engaging protuberances 217 Clearance G 1 is formed between end face F1 and the bottom surface F3a of central incision portion 237a.

As a result, the Z-direction length LP1 of the zoning width T1 and first step portion 219a along Z axis in the A1 of space It is equal with the sum of the Z-direction length LP3 of intermediate step portion 239a (LP1+LP3).In the present embodiment, above-mentioned and (LP1+ LP3 the zoning width T1 along Z axis), i.e. in the A1 of space is identical as the plate thickness TH1 of first coil portion 31 or bigger than its.Cause This, can also below the upper surface of first coil portion 31 and first end flange part 210 between be formed with gap L G10.

Alternatively, it is also possible to adjust first step portion 219a length LP1 and intermediate step portion 239a length LP3, suitably Change they and (LP1+LP3) value.For example, it is also possible to which above-mentioned and LP1+LP3 to be set as to the plate thickness TH1 of first coil portion 31 Below.In this case, being abutted with the upper surface of first coil portion 31 below first end flange part 210.That is, 31 quilt of first coil portion It is sandwiched with the upper surface of the first middle flange portion 231 below first end flange part 210, above-mentioned zoning width T1 and first coil portion 31 plate thickness TH1 is equal.In this case, it can be omitted below the upper surface of first coil portion 31 and first end flange part 210 Between gap L G10.

In the present embodiment, by suitably adjusting length LE1, the first intermediate step portion of the first engaging protuberances 217 The length LC1a of the length LP1 of 219a, the length LP3 of intermediate step portion 239a or the first central incision portion 237a, can form Clearance G 1, and can suitably adjust the zoning width T1 along Z-direction in the A1 of space.

In the present embodiment, when the first engaging protuberances 217 engage with the first central incision portion 237a, intermediate canister portion The circumferential lateral surface of 236 inner circumferential side and the first engaging protuberances 217 is opposite, and the circumferential lateral surface of the first engaging protuberances 217 with First end side of the inner circumferential side of intermediate canister portion 236 abuts.Therefore, the circumferential lateral surface of the first engaging protuberances 217 is as positioning surface It works, can prevent intermediate canister portion 236 from deviateing to radial direction generation position.In addition, in the inner circumferential side of intermediate canister portion 236 And first engaging protuberances 217 circumferential lateral surface between, in manufacture, a little gap can also be formed with.

As shown in Figure 5 B, the second skeleton 22 has the second canister portion 226 of the second end for being combined in intermediate canister portion 236. Two canister portions 226, second end flange part 220 are integrated substantially in parallel with X/Y plane in a manner of extending to the foreign side of radial direction Forming.

As shown in fig. 5e, the cross section with the second canister portion 226 on the upper surface of second end flange part 220, along The periphery of two canister portions 226 is formed with the second positioning region 229 abutted with the inner circumferential side of the second coil part 32.Second positioning region 229 have the second step portion 229a relative to the substantially vertical standing of the upper surface of second end flange part 220.In present embodiment In, the height LP2 of second step portion 229a and the plate thickness TH2 of the second coil part 32 are equal or smaller.

By forming the second positioning region 229, when the upper surface of second end flange part 220 configures the second coil part 32, second The inner circumferential side of coil part 32 is abutted with second step portion 229a, therefore can prevent the second coil part 32 from being generated in radial direction Deviate position.

It is convex to be formed with the engaging engaged with central incision portion 237b for the first end side in the inner circumferential side of the second canister portion 226 Portion 227.Engaging protuberances 227 to first end side snap-latch piece outstanding from constituting, as shown in Figure 5 B, along the outer of the second canister portion 226 Week is formed.Near the X-direction both ends of engaging protuberances 227, to compare other parts to the prominent width of the Z-direction of the first end side Small mode forms the second concavity 228.

There are the second intermediate convex shaped part 238b, the second concavity 228 in engaging protuberances 227 in the engaging of the second concavity 228 Part engaging other than the second intermediate convex shaped part 238b in part and central incision portion 237b in addition.Intermediate canister portion as a result, 236 second end is combined in the second canister portion 226, as shown in fig. 5e, convex among the upper surface of second end flange part 220 and second The space A2 of the second coil part 32 can be configured by being formed between below edge 232.

In the present embodiment, length (height away from the upper surface of the second positioning region 229) LE2 of engaging protuberances 227 is in Between notch 237b length LC1b it is identical or smaller.Therefore, when intermediate canister portion 236 is combined in the second canister portion 226, second Abutted with the upper surface of the second positioning region 229 below middle flange portion 232, and the front end face F2 of engaging protuberances 227 and in Between notch 237b bottom surface F3b between formed clearance G 2.As a result, in the A2 of space along the zoning width T2 of Z axis and The length LP2 of two stage portion 229b is equal.

In the present embodiment, become same with the plate thickness TH2 of the second coil part 32 with the length LP2 of second step portion 229a Etc. mode below, the second positioning region 229 is formed.Therefore, below the second middle flange portion 232 also with the second coil part 32 (being close to) is abutted above, and the dead weight of first coil portion 31 is passed to the second coil part 32 via the second middle flange portion 232.

That is, at least in assembling, apply power corresponding with the dead weight of first coil portion 31 in the second coil part 32, and it is tight Patch ground is clamped between the second middle flange portion 232 and second end flange part 220.In addition, in the second coil part 32, in addition to first Other than the dead weight of coil part 31, the dead weight of the first skeleton 21, intermediate skeleton 23 and intermediate coil portion 33 is also convex via the second centre Edge 232 and be communicated.

In this way, in the present embodiment, due to tight with the upper surface of the second coil part 31 below the second middle flange portion 232 Patch, thus the distance between the second coil part 32 and intermediate coil portion 33 (shortest distance) in second be spaced apart by them Between flange part 232 thickness it is equal.

In the present embodiment, according to the length LE2 of engaging protuberances 227, the second intermediate step portion 229a length LP2 and The length LC1b of second central incision portion 237b forms clearance G 2, below the second middle flange portion 232 with the second coil part 32 The upper surface of be close to.

In the present embodiment, when engaging protuberances 227 engage with the second central incision portion 237b, intermediate canister portion 236 it is interior The circumferential lateral surface of all sides and engaging protuberances 227 is opposite, and the circumferential lateral surface of engaging protuberances 227 and intermediate canister portion 236 is interior Second end side of all sides abuts.Therefore, the circumferential lateral surface of engaging protuberances 227 works as positioning surface, so as to prevent Intermediate canister portion 236 deviates in radial direction generation position.In addition, in the inner circumferential side of intermediate canister portion 236 and engaging protuberances 227 Between circumferential lateral surface, in manufacture, a little gap can also be formed.

As shown in Figure 5 B, at the both ends of the X-direction of second end flange part 220, skeleton foot 26 has been integrally formed it. The lower section of the both ends of X-direction of each skeleton foot 26 from second end flange part 220 to Z-direction is prominent and is formed.Such as Fig. 5 C It is shown, it is accommodated with each pedestal 70 in each skeleton foot 26.In the example shown in Fig. 5 C, the height of the Z-direction of each pedestal 70 Be set as the bottom surface of each pedestal 70 when each pedestal 70 is received into each skeleton foot 26 from each skeleton foot 26 to Z axis below dash forward The height gone out.But the height of the Z-direction of each pedestal 70 is not limited to this, can also suitably adjust.

Transformer 10 involved by present embodiment is manufactured by assembling each component shown in Fig. 2.Hereinafter, using Fig. 2 An example Deng the manufacturing method to transformer 10 illustrates.In the manufacture of transformer 10, prepare skeleton 20 first.

Skeleton 20 in present embodiment is divided into the first skeleton 21, intermediate skeleton 23, the second skeleton 22 by three, pass through by These each skeletons 21,22,23 are integrally combined and are constituted.In the periphery of intermediate skeleton 23, wound shown in Fig. 6 B by α volumes Intermediate coiling 37 forms intermediate coil portion 33.The formation in intermediate coil portion 33 preferably the first skeleton 21, intermediate skeleton 23 and second Before the assembling of skeleton 22, but after can also assembling.

In addition, as shown in fig. 5e, when first coil portion 31 and the second coil part 32 are assembled into skeleton 20, preferably with each bone The assembling of frame 21,22,23 is carried out at the same time.

That is, configuring first coil portion 31 in the upper surface of first middle flange portion 231 of intermediate skeleton 23, make the first canister portion 216 the first engaging protuberances 217 engage with the first central incision portion 237a of intermediate canister portion 236, the first of intermediate canister portion 216 The first canister portion 216 of end combination.

Simultaneously or before and after it, the second coil part 32 is configured in the upper surface of second end flange part 220 of the second skeleton 22, made Second engaging protuberances 227 of the second canister portion 226 engage with the second central incision portion 237b of intermediate canister portion 236, in the second canister portion The second end of canister portion 236 among 226 combinations.

By operating above, the first skeleton 21, the second skeleton 22 and intermediate skeleton 23 are integrally combined, skeleton is constituted 20, each skeleton 21,22,23 is fixed with bonding material etc..

Then, it is drawn above by leading part 37a, 37b from intermediate coil portion 33 shown in Fig. 6 B to wireline reel, such as Fig. 5 F institutes Show, each leading part 37a, 37b and the first fastener 252 is made to engage and is drawn to the direction far from skeleton 20.

In addition, as shown in Figure 6B, constitute first coil portion 31 busbar 38 on formed plate rising portions 384a, 384b and Portion of terminal 381a, 381b.In addition, forming plate rising portions 394a, 394b and end on the busbar 39 for constituting the second coil part 32 Sub-portion 391a, 391b.In addition, the height of the Z-direction of plate rising portions 384a, 384b, 394a, 394b is adjusted, so that terminal Portion 381a, 381b and portion of terminal 391a, 391b are overlapped in Z-direction and are connected.

It is preferred that on busbar 38 and 39, it is formed separately these plate rising portions 384a, 384b, 394a, 394b and end in advance Sub-portion 381a, 381b, 391a, 391b.In this case, as shown in Figure 5 D, preferably with busbar 38 and 39 together integrally Before combining the first skeleton 21, the second skeleton 22 and intermediate skeleton 23, intermediate coiling 37 is wound in intermediate skeleton 23.With mother Line 38 and 39 integrally combine the first skeleton 21, the second skeleton 22 and intermediate skeleton 23 together after, due to plate rising portions The winding of 394a, 394b, intermediate coiling 37 are difficult.

As shown in Fig. 2, after forming skeleton 20, cover 50 is mounted on to the both sides of the Y direction in skeleton 20, later, Magnetic core 40a, 40b is installed from the upper and lower directions of Z-direction.That is, by the front end of middle foot 46a, 46b of magnetic core 40a, 40b that The front end of this and batter 48a, 48b are engaged with each other.

Then, pedestal 70 shown in Fig. 5 D is received into the inside of skeleton foot 26.Alternatively, it is also possible in advance in skeleton foot 26 installed base 70 of portion.Later, bottom plate 91 shown in Fig. 2 is adhered to the bottom peristome of shell 90, above-mentioned assembly is received It is contained in the shell 90 of top opening, and heat transmission resin is filled in the inside of shell 90.It, can by process as described above Manufacture the transformer 10 involved by present embodiment.

As shown in Figure 5 B, the skeleton 20 in present embodiment is by by the first skeleton 21, intermediate 23 and second skeleton of skeleton 22 integrally combine and constitute.Moreover, intermediate skeleton 23 not to be received into the inside of the second skeleton 22, in intermediate canister portion 236 second end (Z-direction lower end) combines the second canister portion 226.As a result, as shown in fig. 5e, the second middle flange portion 232 It is tightly attached to the opposite side surfaces for the second coil part 32 being close to second end flange part 220.

As shown in figure 4, in order to intermediate coil portion 33 in a manner of being contacted with the second middle flange portion 232 wound on intermedium Frame 23 is wound in intermediate coil portion 33 and second coil part 32 of the configuration in the second skeleton 22 of intermediate skeleton 23 to correspond to the The distance of the thickness of two middle flange portions 232 is separated and is configured.In the intermediate skeleton 23 of molding, the can be relatively accurately controlled The thickness of two middle flange portions 232 and be molded.

In addition, the second skeleton 22 is configured in a manner of becoming the downside of gravity direction (Z-direction), if on it Combination 23 and first skeleton 21 of intermediate skeleton, then configure first coil portion 31 on the first middle flange portion 231, utilize first The dead weight of coil part 31 is close to the upper surface of the first middle flange portion 231 below first coil portion 31.In addition, intermediate coil Portion 33 is in a manner of with abutting (being preferably close to) below the first middle flange portion 231 wound on intermediate skeleton 23.

Therefore, wound on the intermediate coil portion 33 of intermediate skeleton 23 and configuration the first skeleton 21 31 energy of first coil portion Enough distances with the thickness corresponding to the first middle flange portion 231 are separated and are configured.In the intermediate skeleton 23 of molding, can compare It accurately controls the thickness of the first middle flange portion 231 and is molded.

If after the first skeleton 21 of combination in this way, 23 and second skeleton 22 of intermediate skeleton, these skeletons are passed through into example The fixing means of such as bonding agent is fixed, then first coil portion 31, intermediate coil portion 33 and the second coil part 32 spool direction Distance correspond respectively to the thickness of flange part 231,232, be maintained respectively certain.Thus, it is easy to improve these coil parts 31, 33, the coupling between 32, and can realize coil device, the i.e. transformer 10 that leakage characteristics are stablized.

In addition, in the present embodiment, insert-molding etc. need not be carried out, therefore the spool direction of skeleton 20 can be reduced Height.Further more, intermediate skeleton 23 not to be accommodated in the inside of the second skeleton 22, in the second end of intermediate canister portion 236 (lower end of Z-direction) combines the structure for having the second canister portion 226, so as to reduce the radial size of the second skeleton 22.It closes It is also identical as the second skeleton 22 in the first skeleton 21.

Further more, in the present embodiment, as shown in figure 4, the conduction of first coil portion 31 and the second coil part 32 by plate The busbar 38,39 of body is constituted, so as to make high current flow through first coil portion 31 and the second coil part 32.

In addition, in the present embodiment, as shown in fig. 5e, in the inner face (the upper surface of Z-direction) of second end flange part 220 With the cross section of the peripheral surface of the second canister portion 226, it is formed with the second positioning abutted with the inner circumferential side of the second coil part 32 Portion 229.By adopting such structure, the inner circumferential side of the second coil part 32 is abutted with positioning region 229, so as to prevent Deviate in radial direction generation position in two coil portion 32.

Moreover, positioning region 229 is formed in the circumferential lateral surface of stage portion 229a, the second middle flange portion 232 and stage portion The step surface (above Z-direction) of 229a abuts.The length LP2 of the Z-direction of stage portion 229a be and the second coil part 32 Plate thickness TH2 length below on an equal basis.By adopting such structure, the second middle flange portion 232 and the second coil part 32 of composition The surface of busbar 39 be reliably close to.

Second end (lower end of Z-direction) side in the inner circumferential side of intermediate canister portion 236, is formed with and is cut with defined depth The the second central incision portion 237b gone out, in first end (upper end of Z-direction) side of the second canister portion 226, be formed with in second Between notch 237b engaging the second engaging protuberances 227, engaging protuberances 227 engage with central incision portion 237b so that second Clearance G 2 is formed between the front end face F2 of the Z-direction of engaging protuberances 227 and the bottom surface F3b of the second central incision portion 237b.It is logical It crosses and uses such structure, it is reliably tight with the upper surface of the busbar 39 of the second coil part 32 below the second middle flange portion 232 Patch.

Further more, engaging protuberances 227 engage with central incision portion 237b, so that the inner circumferential side of intermediate canister portion 236 and engaging The circumferential lateral surface of protrusion 227 is opposite.By adopting such structure, the circumferential lateral surface of engaging protuberances 227 is acted as positioning surface With so as to prevent intermediate canister portion 236 from deviateing in radial direction generation position.

In addition, the present invention is not limited to above-mentioned embodiments, various changes can be carried out within the scope of the invention.

It such as shown in Figure 6 C, can also be by the first end sub-portion 391a of the second end sub-portion 381b of busbar 38 and busbar 39 Connection links busbar 38,39, it is made to be connected in defined coiling direction.In this case, as shown in Fig. 7 (b), respectively by The first coil portion 31 and the second coil part 32 that the busbar 38 and 39 of primary side is constituted are connected in series.

In addition, in Fig. 5 E, the formation of the second positioning region 229 can also be omitted.Alternatively, it is also possible to omit the first positioning region 219 and interfix portion 239 either one.In this case, for example by by the first step portion 219A's of the first positioning region 219 The length of Z-direction is set as LP1+LP3, can augment the effect in interfix portion 239.Or it can also be by interfix portion The length of the Z-direction of 239 intermediate step portion 239a is set as LP1+LP3, in this case, it is fixed can substantially to augment first The effect in position portion 219.

In addition, the relationship of above-mentioned primary coil and secondary coil may be reversed.That is, can also be busbar 38,39 structures At primary coil, intermediate coiling 37 constitutes secondary coil.

Claims (8)

1. a kind of coil device, which is characterized in that

Have：

Skeleton；

First coil portion is made of the electric conductor of plate；

Second coil part is located at the position different from the first coil portion, is made of the electric conductor of plate；And

Intermediate coil portion, between these first coil portion and the second coil part,

The skeleton has：

Intermediate skeleton has the intermediate canister portion for being wound with the intermediate coil portion, in the axial first end of the intermediate canister portion And second end is respectively formed with the first middle flange portion and the second middle flange portion；

There is first skeleton the first canister portion for being combined in the first end, first end flange part to be formed in first canister portion；And

There is second skeleton the second canister portion for being combined in the second end, second end flange part to be formed in second canister portion,

The intermediate coil portion is wound in a manner of being contacted with first middle flange portion and second middle flange portion The intermediate canister portion,

With the opposite side surfaces of second middle flange portion and second coil part for being connected to the second end flange part The mode of abutting has second canister portion in the second end combination of the intermediate canister portion.

2. coil device according to claim 1, which is characterized in that

Second coil part has the shape of general toroidal plate,

In the cross section of the peripheral surface of the inner face and second canister portion of the second end flange part, it is formed with and described second The positioning region that the inner circumferential side of coil part abuts.

3. coil device according to claim 2, which is characterized in that

The positioning region is formed in the circumferential lateral surface of stage portion,

Second middle flange portion is abutted with the step surface of the stage portion,

The axial length of the stage portion is and the plate thickness of second coil part length below on an equal basis.

4. coil device described in any one of claim 1 to 3, which is characterized in that

The second end side in the inner circumferential side of the intermediate canister portion is formed with the central incision portion cut out with defined depth,

In the first end side of second canister portion, the engaging protuberances engaged with the central incision portion are formed with,

In a manner of being formed with gap between the front end face of the engaging protuberances and the bottom surface in the central incision portion, the card Protrusion is closed with the central incision portion to engage.

5. coil device according to claim 4, which is characterized in that

In such a way that the circumferential lateral surface of the inner circumferential side of the intermediate canister portion and the engaging protuberances is opposite, the engaging protuberances with The central incision portion engaging.

6. coil device according to claim 1 or 2, which is characterized in that

The first coil portion can be configured to be formed between the first end flange part and first middle flange portion Space mode, the intermediate canister portion first end combination have first canister portion.

7. coil device according to claim 6, which is characterized in that

With the opposite side surfaces of the first end flange part and the first coil portion for being connected to first middle flange portion The mode of abutting has first canister portion in the first end combination of the intermediate canister portion.

8. coil device according to claim 1 or 2, which is characterized in that

The first coil portion and second coil part constitute the either side in primary coil or secondary coil, the centre Coil part constitutes any other party in primary coil or secondary coil.