CN1851837A

CN1851837A - Inverter transformer

Info

Publication number: CN1851837A
Application number: CNA2006100754998A
Authority: CN
Inventors: 斋藤正树
Original assignee: Sumida Corp
Current assignee: Sumida Corp
Priority date: 2005-04-22
Filing date: 2006-04-21
Publication date: 2006-10-25
Anticipated expiration: 2026-04-21
Also published as: JP2006303304A; CN100562953C; JP4741871B2; KR100758016B1; TWI308350B; KR20060111369A; TW200638444A

Abstract

The invention discloses a paraphrase transformer (10) to output boost orisallobaric AC voltage from secondary side, which consists of coil frame (12a, 12b) on the same shaft of separated coiled primary winding and secondary winding and a couple of magnetic core (24a, 24b) with magnetic core feet (24f, 24g, 24h), wherein the closed magnetic circuit in connection with coil frame (12a, 12b) is formed by a joint couple of magnetic core (24a, 24b), which plugs magnetic core feet (24f, 24g) in the coil frame (12a, 12b).

Description

Inverter transformer

Technical field

What the present invention relates to is to use in the bias light of the LCD panel inverter transformer with the lamp circuit of discharge lamp.

Background technology

In recent years, the price competition with various electric equipments of LCD monitor such as LCD TV and personal computer is growing more intense, and the electronic components such as inverter transformer that are installed on LCD monitor are also constantly required to reduce cost and cut down the part number of packages.In order to tackle this requirement, the inverter transformer of 1 input, 2 outputs is used.As such inverter transformer, for example, existing open at patent documentation 1.

[patent documentation 1] spy opens 2001-267156 communique (Fig. 1)

Summary of the invention

Invent problem to be solved

Patent documentation 1 disclosed inverter transformer, with the slotting inboard of using coil rack at the elementary winding that is wound with elementary winding that leads to of 2 rod core, secondary winding is wound in this 2 rod core respectively.By such formation, the high frequency voltage that is added on elementary winding is outward boosted, and on 2 discharge lamps that connect secondary winding, make these discharge lamp lightings.

But patent documentation 1 disclosed inverter transformer is because be the transformer of open magnetic circuit structure, so the part of the magnetic flux that the electromagnetic combination by elementary winding and secondary winding produces is to the external leaks of inverter transformer.Therefore exist owing to cause LCD monitor to produce the problem of noise to outside leaked magnetic flux.

The present invention In view of the foregoing forms, and its purpose is to provide a kind of inverter transformer that can prevent to outside leakage magnetic flux.

Solve the means of problem

In order to solve above-mentioned problem, inverter transformer of the present invention be the alternating voltage that is used for being transfused to primary side boost or step-down after to the inverter transformer of primary side output, it is provided with: elementary winding separates a plurality of coil racks of reeling in the back with secondary winding on coaxial, and at least one side's magnetic core has a pair of magnetic core of the magnetic core pin identical at least with the number of coil rack; Insert the form of a plurality of coil racks inboard respectively with the magnetic core pin, dock above-mentioned a pair of magnetic core, a pair of magnetic core that has been docked forms the closed magnetic circuit that links a plurality of coil racks.

Under situation about constituting like this, after making the magnetic core pin insert the coil rack that is wound with elementary winding and secondary winding, dock a pair of magnetic core, form the closed magnetic circuit that links each coil rack.Therefore, the magnetic flux that elementary winding and secondary winding produce has formed magnetic circuit in above-mentioned closed magnetic circuit, be prevented from from the situation of inverter transformer to outside leakage magnetic flux thus.Therefore, can prevent that the various electric equipments such as LCD that this inverter transformer is housed from producing noise and vortex flow.

Again, other invention on the basis of foregoing invention, and then, be used for secondary winding is cut apart the flange of coiling on the direction of principal axis of coil rack, outstanding from the outer surface of coil rack, and be set to arrange along the direction of principal axis of coil rack.

Under situation about constituting like this, finish to reel the secondary winding of in divided field, can reeling successively from beginning to be wound up into.Therefore, secondary winding is back and forth reeled on coil rack, can prevent that potential difference from being that the reel end of winding and the end of end coiling winding of maximum beginning contacts.Therefore, the end of winding causes insulation breakdown each other, consequently, can prevent the short circuit each other of this end.

And then other invention is on basis of above-mentioned each invention, and flange is provided with the end that is used for the secondary winding of will reel on the coil rack and guides the breach that is arranged at the terminal on the coil rack into.By such formation,, also this end can be bundled on the terminal even do not apply big voltage to the end of secondary winding.Therefore, can prevent the end broken string of winding.

And then other invention has between the coil rack of elementary winding and secondary winding on the basis of above-mentioned each invention, is provided with the intermediate coil skeleton.Have between the coil rack and above-mentioned intermediate coil skeleton of elementary winding and secondary winding, be respectively arranged with and determine the concaveconvex structure that dock mutually the position easily.

The effect of invention

Adopt the present invention, can prevent that magnetic flux from leaking to the outside of inverter transformer.

Description of drawings

Fig. 1 is the stereogram of the inverter transformer of the present invention's one example, is the make progress schematic diagram of state of the one side that is not installed on circuit board.

Fig. 2 is the vertical view of the inverter transformer of Fig. 1.

Fig. 3 is the stereogram that the inverter transformer with Fig. 1 gets from its one side observation post that is installed in circuit board.

Fig. 4 is the upward view of the inverter transformer of Fig. 1.

Fig. 5 is the right side view of the inverter transformer of Fig. 1.

Fig. 6 is the rearview of the inverter transformer of Fig. 1.

Fig. 7 is the stereogram that the side of coil rack that will be used for the inverter transformer of Fig. 1 gets from right side observation post.

Fig. 8 is the stereogram that the side of coil rack that will be used for the inverter transformer of Fig. 1 gets from left side observation post.

Fig. 9 is the stereogram that the intermediate coil skeleton that will be used for the inverter transformer of Fig. 1 gets from right side observation post.

Figure 10 is the stereogram of the variation of inverter transformer of the present invention, is the make progress schematic diagram of state of the one side that is not installed on circuit board.

Symbol description

10 ... inverter transformer

12a, 12b ... coil rack

12n, 12s ... the coiling flange

12v ... notch part (breach)

12w ... one distolateral notch part (breach)

16 ... the intermediate coil skeleton

24 ... magnetic core member

24a, 24b ... magnetic core

24d, 24e ... end magnetic core portion

24f, 24g, 24h ... magnetic core foot (magnetic core pin)

31,32 ... terminal

35 ... the coil rack body

Preferred forms

Below, according to Fig. 1～Fig. 9 the inverter transformer 10 of the present invention's one example is described.Fig. 1 is the stereogram of the inverter transformer 10 of the present invention's one example, is the make progress schematic diagram of state of the one side that is not installed on circuit board.Again, Fig. 2 is the vertical view of the inverter transformer 10 of Fig. 1.Fig. 3 is the stereogram that the inverter transformer 10 with Fig. 1 gets from its one side observation post that is installed in circuit board.Again, Fig. 4 is the upward view of the inverter transformer 10 of Fig. 1.Fig. 5 is the right side view of the inverter transformer 10 of Fig. 1.Fig. 6 is the rearview of the inverter transformer 10 of Fig. 1.Again, Fig. 7 is the stereogram that the coil rack 12a that will be used for the inverter transformer 10 of Fig. 1 gets from right side observation post.Fig. 8 is the stereogram that the coil rack 12a that will be used for the inverter transformer 10 of Fig. 1 gets from left side observation post.Again, Fig. 9 is the stereogram that the intermediate coil skeleton 16 that will be used for the inverter transformer 10 of Fig. 1 gets from right side observation post.And, in following figure, a distolateral direction that is meant elementary winding configuration, another distolateral direction that is meant the secondary winding configuration.Again, in Fig. 9, a distolateral tiltedly below, a left side that is meant, another is distolateral to be meant right oblique upper.Again, in Fig. 1, Fig. 3, Fig. 7, Fig. 9, the left side is meant left oblique upper, and the right side is meant right tiltedly below.Again, in Fig. 8, the left side is meant tiltedly below, a left side, and the right side is meant right oblique upper.In the following description, omitted the diagram of elementary winding and secondary winding, still, in Fig. 1～Fig. 6, elementary winding and secondary winding are the parts that are wound in each coil rack 12a, 12b respectively.

Inverter transformer 10, as shown in Figure 1, mainly be by 2 coil rack 12a, 12b, be wound in not shown elementary winding and secondary winding on coil rack 12a, the 12b respectively, be disposed at the intermediate coil skeleton 16 between coil rack 12a, the 12b, and constitute with respect to the magnetic core member 24 that the magnetic flux that is produced by not shown elementary winding and secondary winding forms magnetic circuit.

As shown in Figures 7 and 8, coil rack 12a constitutes by having formed alar part 13a, the 13b that section is the cylindrical portion 12c of foursquare tubular and is arranged at this cylindrical portion 12c two ends.Cylindrical portion 12c is a cylindrical member, is the center of foursquare square column at its section, has section shape and is roughly foursquare hole 12d.At the two ends of cylindrical portion 12c, be formed with by 4 outside wall surface 12e of cylindrical portion 12c whole towards outside flange part 12f, 12g outstanding, that profile is rectangle.Flange part 12f, 12g all reach outstanding upward equal length to the left and right directions of Fig. 7, more outstanding than other 3 directions downwards length length (below, the part that flange part 12f, 12g is outstanding downwards is called " following quadrate part ").By forming in this wise, the profile of flange part 12f, 12g is rectangle.

Again, by the central authorities of cylindrical portion 12c rise a little to a distolateral outside wall surface 12e place be formed with flange part 12f identical shaped cut apart flange 12h.Cut apart flange 12h by formation, the outside wall surface 12e of cylindrical portion 12c is split into the primary side coiling 12j of portion of the elementary winding of reeling (end diagram) and the primary side coiling 12k of portion of coiling secondary winding (not shown).And among Fig. 7, on the upper side 12m as the face above the primary side coiling 12k of portion, 5 coiling flange 12n that form along left and right directions are set to vertical arrangement.On the primary side coiling 12k of portion,, form 5 that the coiling flange 12s of U word shape is set to vertically arrange by downside 12q and through left surface 12r from the right flank 12p of the position that forms the flange 12n that respectively reels again.On each coiling flange 12s, be formed at left surface 12r and right flank 12p part, be equivalent to the upper end 12t of 2 upper ends of U word shape, form the top slightly that is positioned at upper surface 12m.Again, the inboard of 2 upper end 12t of each flange 12s that reels is formed with the breach towards the below by this upper end 12t respectively, and this breach forms the ditch 12u of portion between coiling flange 12s and right flank 12p and left surface 12r.And then, be formed with notch part 12v respectively in 2 bights of the U word shape of each coiling flange 12s.And, among this notch part 12v, being formed near a distolateral distolateral notch part 12w, the position that it is cut and other notch parts 12v are in a ratio of slightly the position towards the top.

Form respectively to distolateral and alar part 13a, a 13b that the other end is side-prominent by flange part 12f, 12g.Alar part 13a is set to by the following quadrate part of flange part 12f distolateral outstanding to one.And this alar part 13a forms also wideer than the width of flange part 12f on two directions about Fig. 7.And then alar part 13a roughly is the shape of cuboid, is arranged on the distolateral of flange part 12f, so that this cuboid is vertically consistent with the left and right directions of Fig. 7.Again, alar part 13a forms, and its upper surface 13c is in the same plane with 1 internal face 12z in 4 internal faces that form hole 12d.That is, alar part 13a is formed on the distolateral and than on the outside part of internal face 12z of flange part 12f.Again, the end at alar part 13a is formed with 4 terminal ditch 13f that cut by upper surface 13c below Fig. 7.This terminal ditch 13f is arranged on the vertical of alar part 13a, and equates at interval.On the 13g of the lower surface of alar part 13a, be provided with 3 gathering sill 13h again.The position of this gathering sill 13h between the terminal ditch 13f of vertical adjacency of alar part 13a formed upward by the lower surface 13g of alar part 13a.And as shown in Figure 4, each gathering sill 13h is connected with another distolateral formed ditch 12i of portion towards a distolateral below by quadrate part under the flange part 12f.Therefore, by gathering sill 13h and the 12i of ditch portion, form the ditch of " ヘ " word shape that has passed through the following quadrate part of flange part 12f by alar part 13a.

On the other hand, alar part 13b also is set to by the following quadrate part of flange part 12g side-prominent to the other end.Again, as shown in Figures 7 and 8, this alar part 13b only upwards forms wideer than the width of flange part 12g at the left of Fig. 8.And then the shape of alar part 13b roughly is cuboid, be set to another of flange part 12g distolateral adjacent so that this cuboid is vertically consistent with the left and right directions of Fig. 8.Again, alar part 13b is the same with alar part 13a, form in its upper surface 13j and 4 internal faces that form hole 12d 1 internal face 12z at grade.That is it is distolateral and than on the outside part of internal face 12z that, alar part 13b is formed on another of flange part 12g.As shown in Figure 6,, be formed with 2 terminal ditch 13k of portion to the below of Fig. 6 by its upper surface 13j at the other end of alar part 13b again.This terminal ditch 13k of portion is by forming the wide width part 13m of equal wide to certain depth vertically downward from upper surface 13j, by both sides tilt shrink formed contraction flow region 13n thereafter, and the narrow width part 13p formation that further forms equal wide from contraction flow region 13n vertically downward.As shown in Figure 7, be formed with the notch part 13q that is vertically cut in the lower right of alar part 13b again.And then, in the side, right side of alar part 13b, be formed with along the longitudinal direction by the outstanding to the right flange 13r in this side.Below the left side of the alar part 13b of Fig. 8, form the 13u of ditch portion upward by lower surface 13t.One of quadrate part distolateral face is connected under the 13u of this ditch portion and the flange part 12g, is formed with on one of this time quadrate part distolateral face to the direction of the 13u of ditch portion, the tapered portion 13v that promptly cut to other end side-lower.

Coil rack 12b forms and coil rack 12a left-right symmetric.Therefore, the alar part 13a of coil rack 12b is the same with the situation of coil rack 12a, is arranged on the distolateral of flange part 12f.On the other hand, it is distolateral that alar part 13b is arranged on another of flange part 12g, forms and be arranged on the symmetrical shape of alar part 13b of coil rack 12a.That is, the alar part 13b of coil rack 12b is arranged to the width widen on right side with respect to flange part 12g.

As shown in Figure 9, intermediate coil skeleton 16 constitutes by forming the be rectangle cylindrical portion 17 of tubular and the alar part 18 that is arranged on these cylindrical portion 17 other ends of section.Cylindrical portion 17 is cylindrical members, the center of the square column that is rectangle at its section, and having section shape is rectangular hole 17a.At the two ends of cylindrical portion 17, be provided with whole by 4 outside wall surface 17b of cylindrical portion 17 towards outer flange part 17c, the 17d that forms the profile rectangular in shape.Flange part 17c the left and right directions of Fig. 9 and above form equal length, the length that forms than other 3 directions long (below, the part that forms of flange part 17c is called " following quadrate part ") downwards downwards.Again, flange part 17d is the outstanding equal length of direction to the left and right, and upward than the outstanding short slightly length of direction to the left and right.Again, 17c is identical with flange part, and outstanding downwards length is than to the outstanding length of other 3 directions long (below, the outstanding downwards part of flange part 17d is called " following quadrate part ").By forming such length, the profile of flange part 17c, 17d is rectangle.

Again, rise a little to a distolateral outside wall surface 17b place by the central authorities of cylindrical portion 17, be formed with flange part 17c identical shaped cut apart flange 17e.Cut apart flange 17e by formation, the outside wall surface 17b of cylindrical portion 17 is split into primary side field 17f and primary side field 17g.

Alar part 18 is set to by the following quadrate part of flange part 17d side-prominent to the other end.As shown in Figure 9, the width of this alar part 18 equates with the width of flange part 17d.Alar part 18 roughly is cuboid, be set to another of flange part 17d distolateral adjacent so that this roughly cuboid vertically and the vertical consistency of intermediate coil skeleton 16.Again, alar part 18 form in its upper surface 18a and 4 internal faces that form hole 17a 1 internal face 17g at grade.That is it is distolateral and than on the outside part of internal face 17g that, alar part 18 is formed on another of flange part 17d.Be formed with the vertical notch part 18b that is longitudinally cut in the equal height position at the left and right sides of alar part 18 face again.

Magnetic core member 24 is made of a pair of magnetic core 24a, 24b.Magnetic core 24a is, rise by forming the two ends that section slightly is the 24c of rod core portion of foursquare rod core, on the direction vertical, extend 2 24d of end magnetic core portion, 24e relatively with respect to the 24c of rod core portion, and then, rise inboard by 2 24d of end magnetic core portion, 24e on the 24c of rod core portion, with the end magnetic core 24d of portion, 24e equidirectional on, extend 3 24f of magnetic core foot, 24g, 24h.The 24d of end magnetic core portion, 24e are respectively equal length, its section shape all slightly is rectangle.The 24f of this magnetic core foot, 24g, 24h to the end magnetic core 24e of portion, are arranged to the order of the 24f of magnetic core foot, 24h, 24g from the end magnetic core 24d of portion, and the length of the 24f of this magnetic core foot, 24g, 24h forms and the end magnetic core 24d of portion, length that 24e is identical.Magnetic core 24b and magnetic core 24a form identical shaped.Therefore, under the state of putting upside down mutually in magnetic core 24b and magnetic core 24a table, form a pair of magnetic core 24a, 24b.In this topsy-turvydom, by magnetic core 24a and magnetic core 24b butt joint are formed magnetic core member 24.Magnetic core member 24 is formed by ferrite, still, also can use other magnetic material of for example permalloy, sendust, iron carbonyl etc.

On inverter transformer 10, as Fig. 1 and shown in Figure 3, on each alar part 13a, the 13a of coil rack 12a, 12b, be provided with 4 respectively and add up to 8 terminal ditch 13f, on this terminal ditch 13f, be provided with the terminal hole 14a that connects lower surface 13g by the bottom surface of terminal ditch 13f.And a side of L word who is the terminal 31 of L font inserts terminal hole 14a from terminal ditch 13f.Insert the state of terminal hole 14a by this terminal 31, terminal 31 is one distolateral and installed surface is side-prominent to alar part 13a's.Again, on each alar part 13b, the 13b of coil rack 12a, 12b, 2 terminal ditch 13k of portion that add up to 4 are set respectively, on the narrow width part 13p of this terminal ditch 13k of portion, are provided with the terminal hole 14b that connects the lower surface of alar part 13b by the bottom surface of this terminal ditch 13k of portion.And a side of L word who is the terminal 32 of L font inserts terminal hole 14b from the terminal ditch 13k of portion.Insert the state of terminal hole 14b by this terminal 32, terminal 32 is distolateral and installed surface is side-prominent to another of alar part 13b.

On each coil rack 12a, 12b, be wound with not shown elementary winding (following only be called " elementary winding ") and not shown secondary winding (following only be called " secondary winding ").Because inverter transformer 10 plays a role as step-up transformer, so the number of turn of the elementary winding of turn ratio of secondary winding is many.As mentioned above, be wound with elementary winding on each primary side coiling 12j of portion of coil rack 12a, 12b.2 ends of this elementary winding according to the circuit that is formed at mounting circuit boards respectively, are bundled on 2 the distolateral outstanding part in 4 terminals 31 that are inserted in each coil rack 12a, 12b.These 2 ends are by being formed at the 12i of ditch portion, the gathering sill 13h of flange part 12f, alar part 13a, and the 12i of portion guides terminal 31 into from the primary side coiling.Again, inverter transformer 10 is because be the transformer of 1 input, 2 outputs, so being wound in the driving voltage of being imported on each elementary winding of coil rack 12a, 12b is identical voltage.

On coil rack 12a, the 12b primary side coiling 12k of portion separately, be wound with secondary winding again.This secondary winding is passing through on the field (hereinafter referred to as " cutting apart the field ") that coiling flange 12n, 12s be partitioned on the primary side coiling 12k of portion, from other end side direction one distolateral coiling in order, be wound in the most close end of cutting apart the secondary winding of field one one end side portion, for example, after in being drawn towards Fig. 7, being formed at a distolateral notch part 12w, notch part 12v, notch part 13q on right side, be bundled on the side-prominent part of terminal 32 1 sides' the other end.At this moment, the end of the opposing party's secondary winding is drawn towards the opposing party of terminal 32 from another one end side portion that approaches most to cut apart the field by tapered portion 13v and the 13u of ditch portion, and is bundled on the side-prominent part of this terminal 32 the opposing party's the other end.But, not only like this, because as homophase, anti-phase (phase difference of input voltage and output voltage is 0 ° and 180 °), so, the terminal that also secondary winding can be begun to reel and finish to reel is opposite with above-mentioned situation, guide a side end into the most close another one end side portion of cutting apart the field from the opposing party of terminal 32 by notch part 13q, secondary winding is oppositely reeled on the primary side coiling 12k of portion, with the opposing party's end by cut apart the field near an one end side portion, by the distolateral notch part 12w who is formed at the left side of Fig. 7, notch part 12v, the 13u of ditch portion guides the opposing party of terminal 32 into.After cutting apart the field secondary winding is reeled, this secondary winding by the 12v of ditch portion, moves to this secondary winding with this and cuts apart cutting apart on the field of field adjacency again.And in this example, output voltage is made as 1600～2000V, and the maximum voltage of respectively cutting apart between the field is made as 333V., output voltage reaches the maximum voltage of respectively cutting apart between the field and is not defined as these values.

In inverter transformer 10, by coil rack 12a, the 12b of reel elementary winding and secondary winding, intermediate coil skeleton 16 is held.At this moment, embed vertical notch part 18b of the two sides be formed at intermediate coil skeleton 16 alar parts 18 by being formed at each flange 13r on coil rack 12a, the 12b alar part 13b, fix coil rack 12a, 12b and intermediate coil skeleton 16 (below, will be called " coil rack body 35 ") by coil rack 12a, 12b clamping intermediate coil skeleton 16.

Around coil rack body 35, dispose the magnetic core member 24 that forms magnetic circuit with respect to coil rack body 35.Magnetic core member 24 is, by respectively the 24f of magnetic core foot of magnetic core 24a, 24h, 24g being inserted hole 12d, the hole 17a of intermediate coil skeleton 16 of coil rack 12a and the hole 12d of coil rack 12b, simultaneously, also respectively the 24f of magnetic core foot of magnetic core 24b, 24h, 24g are inserted hole 12d, the hole 17a of intermediate coil skeleton 16 of coil rack 12a and the hole 12d of coil rack 12b, magnetic core 24a and magnetic core 24b butt joint are formed with this form.The top end face of the 24d of end magnetic core portion, the 24e of magnetic core 24a and the 24d of end magnetic core portion of magnetic core 24b, the top end face of 24e join mutually in the outside of coil rack body 35.Again, the top end face of the 24f of each magnetic core foot of the top end face of the 24f of each magnetic core foot of magnetic core 24a, 24h, 24g and magnetic core 24b, 24h, 24g joins mutually in the inside of the hole 12d of the hole 17a of the hole of coil rack 12a 12d, intermediate coil skeleton 16 and coil rack 12b.Fix with sticker between the top end face of the 24d of end magnetic core portion, the 24e of magnetic core 24a, the 24b that joins mutually and the 24f of magnetic core foot, 24h, 24g.Magnetic core member 24 formation binding each coil rack 12a, the 12b that form like this, 16 closed magnetic circuit.Owing to disposed magnetic core member 24, in inverter transformer 10, the voltage that is transfused to elementary winding is responded at secondary winding, forms electromagnetic coupled between elementary winding and secondary winding.And then by the closed magnetic circuit in each coil rack 12a, 12b, 16 formation, the magnetic flux that is produced by elementary winding that is wound in coil rack 12a, 12b and secondary winding forms magnetic circuit in the closed magnetic circuit of magnetic core member 24.Therefore, can prevent that the magnetic flux that is produced by elementary winding and secondary winding from leaking to the outside of inverter transformer 10.

Then, the manufacture method for inverter transformer 10 describes.

At first, among the terminal hole 14a of 8 the terminal ditch 13f of 4 totals that on alar part 13a, the 13a of coil rack 12a, 12b, form respectively, insert a side of the L word of L font terminal 31.Among the terminal hole 14b of 4 the terminal ditch 13k of portion of 2 totals that on alar part 13b, the 13b of coil rack 12a, 12b, form respectively, insert a side of the L word of L font terminal 32 again.Like this, be inserted under the state of terminal hole 14a, 14b, form terminal 31,32 another distolateral and installed surface is side-prominent state to alar part 13a, 13b at terminal 31,32.

Then, elementary winding and secondary winding are wound on separately the primary side coiling 12j of portion and the primary side coiling 12k of portion of coil rack 12a, 12b.Coiling about elementary winding to coil rack 12a, 12b, be that end with one side is bundled in 4 terminals 31 that insert each coil rack 12a, 12b 1, guide the opposing party's end into the primary side coiling 12j of portion by gathering sill 13h, the 12i of ditch portion.Then, elementary winding is wound on the primary side coiling 12j of portion, guides the opposing party's end into terminal 31 by the 12i of ditch portion, gathering sill 13h, this end is bundled in remaining 3 terminals 31 1.As described above, elementary winding will be wound onto on coil rack 12a, the 12b.

About the coiling to coil rack 12a, 12b of secondary winding, be a side who the end of one side is bundled in 2 terminals 32 that insert each coil rack 12a, 12b, guide secondary winding into the primary side coiling 12k of portion by the 13u of ditch portion, tapered portion 13v.Then, secondary winding is wound on another distolateral the cutting apart on the field that approaches the primary side coiling 12k of portion most.Then, will pass through the 12u of ditch portion near another distolateral secondary winding of reeling on the field of cutting apart, move to this with this and cut apart cutting apart on the field of field adjacency, at the secondary winding of reeling on the field of cutting apart of this adjacency.Like this, respectively cutting apart the field by the other end side direction one distolateral secondary winding of reeling successively.Then, with secondary winding approach most to cut apart reel on the distolateral part in field one after, guide the opposing party's end the opposing party of terminal 32 into by a distolateral notch part 12w, notch part 12v, notch part 13q, and be bundled in the opposing party of this terminal 32.And, because as homophase, anti-phase, so, this for make secondary winding begin to reel and finish to reel become under the opposite situation, guide the side end that is bundled in terminal 32 the opposing party into the primary side coiling 12k of portion from notch part 13q, secondary winding by other end side direction one distolateral cutting apart the field and reeling successively after, by the side that a distolateral notch part 12w, notch part 12v and the 13u of ditch portion guide terminal 32 into, make it be bundled in a side of this terminal 32 the opposing party's end.

Then, coil rack 12a, 12b by being wound with elementary winding and secondary winding be intermediate coil skeleton 16 clampings configuration, each flange 13r that is formed at coil rack 12a, 12b alar part 13b embedded formed vertical notch part 18b on the two sides of intermediate coil skeleton 16 alar parts 18.Like this, so that coil rack 12a, 12b are fixed on the intermediate coil skeleton 16, form coil rack body 35.

After having formed coil rack body 35, the 24f of magnetic core foot, 24h, the 24g that will constitute the magnetic core 24a of magnetic core member 24 respectively insert hole 12d, the hole 17a of intermediate coil skeleton 16 of coil rack 12a and the hole 12d of coil rack 12b, simultaneously, also make the 24f of magnetic core foot, 24h, the 24g of magnetic core 24b insert hole 12d, the hole 17a of intermediate coil skeleton 16 of coil rack 12a and the hole 12d of coil rack 12b respectively, then magnetic core 24a and magnetic core 24b are docked from the both sides of coil rack body 35.Then, the top end face of the 24d of end magnetic core portion, the 24e of magnetic core 24a, 24b of butt joint mutually and the 24f of magnetic core foot, 24h, 24g is fixed with sticker.As mentioned above, produced inverter transformer 10.

In the inverter transformer 10 that constitutes as mentioned above, magnetic core member 24 forms and links each coil rack 12a, the 12b that constitutes coil rack body 35,16 closed magnetic circuit.Therefore, the magnetic flux that produces by elementary winding and secondary winding forms magnetic circuit in above-mentioned closed magnetic circuit.So, can prevent magnetic flux from inverter transformer 10 to external leaks.Thereby, can prevent that the various electric equipments such as LCD that this inverter transformer 10 is housed from producing noise and vortex flow.Again, on inverter transformer 10, because intermediate coil skeleton 16 is configured with the state around the 24h of magnetic core foot, 24h, even so under the situation that makes between the 24h of magnetic core foot, the 24h of butt joint the leakage type inverter transformer that forms the gap, also can seal magnetic flux by intermediate coil skeleton 16 from clearance leakage.

Again, in inverter transformer 10, on the primary side coiling 12k of portion of coil rack 12a, 12b, coiling flange 12n, 12s are set to the vertical arrangement along coil rack 12a, 12b.Therefore, by the secondary winding of in cutting apart the field, reeling successively, can be with the other end side direction one distolateral coiling of this secondary winding from coil rack 12a, 12b.So, secondary winding is back and forth reeled on coil rack, can prevent that just potential difference from being that the reel end of winding and the end of end coiling winding of maximum beginning contacts.Therefore, cause insulation breakdown between the end of secondary winding, consequently, can prevent the short circuit each other of this end.

Again, in inverter transformer 10, on 2 bights of U word shape of coiling flange 12s, be formed with notch part 12v respectively as breach, in being formed at this notch part 12v on the coiling flange 12s near a distolateral position, being formed with to be switched to and comparing a distolateral notch part 12w who is positioned at the top with other notch parts 12v.Therefore, can positively guide the end that is wound on the secondary winding on the primary side coiling 12k of portion into be arranged at alar part 13b terminal 32.Again, compared the position that is positioned at the top,, just this end can be bundled on the terminal 32 so the end to secondary winding does not apply big voltage because a distolateral notch part 12w switches to other notch part 12v.Therefore, can prevent the end broken string of secondary winding.Again, because a notch part 12v and a distolateral notch part 12w are formed at the left and right sides of coiling flange 12s, so no matter secondary winding begins to reel from which that is arranged on 2 terminals 32 on the alar part 13b, all becomes possibility.

More than, an example of the present invention is illustrated, but in addition the present invention can also carry out various distortion.Below be explained.

In above-mentioned example, the coil rack 12a, the 12b that are used in inverter transformer 10 are set at 2, but are not limited to 2, also can be more than 3 or 3, the inverter transformer of 1 other outputs of input.Also the quantity of coil rack 12a, 12b can be set at 1 again.Again, coil rack 12a, 12b form as two members respectively, but coil rack 12a, 12b are formed as one.

Again, in above-mentioned form, the quantity that is arranged at the terminal 31 of alar part 31a is set at 4, but is not limited to these, also can be below 3 or 3, more than 5 or 5.The quantity of terminal 31 is more than 5 or 5, the feedback winding that is used for feeding back to primary side once more can be wound in terminal 31.

Again, in above-mentioned example, magnetic core member 24 is 2 magnetic core member 24a, 24b formations that are provided with 3 24f of magnetic core foot, 24g, 24h by the magnetic core of " コ " word shape, but be not limited to these, the magnetic core and the I type magnetic core that also can be provided with 3 magnetic core foots by the magnetic core of " コ " word shape constitute magnetic core member 24.Again, also can make each length of the 24d of end magnetic core portion, the 24e that are arranged at magnetic core 24a, 24b and the 24f of magnetic core foot, 24g, 24h is different length.

Again, in above-mentioned example, coiling flange 12n, 12s respectively are set to 5, but are not limited to these, and each quantity also can be below 4 or 4, more than 6 or 6.

Again, in above-mentioned example, the section that is shaped as of cylindrical portion 12c slightly is foursquare cylindrical body, but be not limited to these, also can be rectangle for section, circular or oval-shaped cylindrical body.

Again, in above-mentioned example, the one side that is not installed in circuit board of inverter transformer 10 member of no use hides, but, as shown in figure 10, also can hide the one side that is not mounted of inverter transformer 10 fully with the plate 40 of magnetic materials such as ferrite by improving the height of magnetic core member.Thus, can more positively prevent from inverter transformer 10 to outside leakage magnetic flux.

Again, in above-mentioned example, the shape of terminal 31,32 all is the L font, but is not limited to these, also can be the terminal of other shapes of anchor type or U font etc.Thus, can prevent the lacking of end of winding.

Industrial applicability

It is employed respectively that inverter transformer of the present invention can be used in LCD TV and personal computer etc. Plant the background light on the LCD panel.

Claims

1, a kind of inverter transformer, it be the alternating voltage that will be transfused to primary side boost or step-down after to primary side output; It is characterized in that being provided with:

Elementary winding separates a plurality of coil racks of reeling in the back with secondary winding on coaxial, and at least one side's magnetic core has a pair of magnetic core of the magnetic core pin identical at least with the number of above-mentioned coil rack;

Insert the form of above-mentioned a plurality of coil racks inboard respectively with above-mentioned magnetic core pin, dock above-mentioned a pair of magnetic core, the above-mentioned a pair of magnetic core that has been docked forms the closed magnetic circuit that links above-mentioned a plurality of coil racks.

2, inverter transformer as claimed in claim 1, it is characterized in that, be used for above-mentioned secondary winding is cut apart the flange of coiling on the direction of principal axis of above-mentioned coil rack, outstanding from the outer surface of above-mentioned coil rack, and be set to arrange along the direction of principal axis of above-mentioned coil rack.

3, inverter transformer as claimed in claim 2 is characterized in that, on above-mentioned flange, is provided with the end that is used for the above-mentioned secondary winding of will reel on the above-mentioned coil rack and guides the breach that is arranged at the terminal on the above-mentioned coil rack into.

4, inverter transformer as claimed in claim 1 is characterized in that, has between the above-mentioned coil rack of above-mentioned elementary winding and secondary winding, is provided with the intermediate coil skeleton.

5, inverter transformer as claimed in claim 4 is characterized in that, has between the above-mentioned coil rack and above-mentioned intermediate coil skeleton of above-mentioned elementary winding and secondary winding, is respectively arranged with and can determines the concaveconvex structure that dock mutually the position easily.