CN101640112B - Ferrite core and transformer using the same - Google Patents

Abstract

A ferrite core includes an end face portion, a pair of outer legs protruding from the end face portion, and a center leg protruding from the end face portion between the pair of outer legs. A width W1 close to one end portion of the center leg in a Y-axis direction perpendicular to a facing direction of the outer legs is smaller than a width W2 close to the other end portion. According to this configuration, a circuit component may be positioned close to the end portion. A transformer includes the ferrite core. And a coil frame for the transformer includes a cylindrical bobbin; wherein the division line based on any direction and position divides the cross section vertical to the coiling direction of at least the chamber and the periphery into two areas which are unsymmetrical.

Description

FERRITE CORE and the transformer that adopts this FERRITE CORE

Technical field

The present invention relates in being applicable to the coiling element of various electronic equipments employed FERRITE CORE and with the corresponding bobbin of this FERRITE CORE, and relate to the transformer that comprises FERRITE CORE and bobbin.

Background technology

In the correlation technique, the FERRITE CORE that uses in known a kind of coiling element in being installed on office machine and equipment, this FERRITE CORE comprise end face portion, a pair of column jacket that protrudes from the end face portion both sides and the center pillar that protrudes from the end face portion between the column jacket.The center pillar of conventional FERRITE CORE has circle, polygon, ellipse or oval cross-section, through center pillar being inserted the reel of the bobbin that twines with coiling, constitutes inductor, such as choking-winding or transformer.

Shown in figure 21, in patent documentation 1 and 2, disclosed a kind of FERRITE CORE 40 that is used for transformer, this magnetic core has oval or avette cross section, to obtain the little and thin transformer of size.In Figure 21, specify like lower label for each element: respectively, the column jacket 42 of magnetic core 40; Bobbin 43, the reel 44 of bobbin 43, the elementary winding terminal daughter board 45 and the secondary rolling thread terminal board 46 of bobbin; Respectively, the coiling 47 around the reel 44, the elementary terminal 49 that is connected with elementary coiling; The secondary terminal 50 that is connected with secondary rolling thread, primary side to (port) 51 and secondary end to 52.

[patent documentation 1] JP-UM-B-3-53462

[patent documentation 2] JP-UM-A-5-87918

Center pillar in the conventional FERRITE CORE has circle, polygon, ellipse or avette cross section.For example, when the cross section of center pillar was oval shown in Figure 23, the two ends at the center pillar 41 of magnetic core as one man produced leakage flux φ 1 and φ 2 by the electric current through the coiling (not shown), label 42 expression column jackets.

The leakage flux φ that both sides produced 1 at conventional magnetic core 40 is identical with φ 2, and with the adjacent circuit element of noise effect.Particularly, the kickback transformer in the electronic equipment has the slit between the magnetic core center pillar, so, produce a large amount of leakage fluxs from this slit.Therefore, in the conductor of the terminal of forming the adjacent circuit element or holding wire, produce additional electric current, hinder the performance of improving circuit element like this.Need place away from transformer by the circuit element of noise effect, the result uses the sort circuit element just to be difficult to make undersized electric and electronic equipment, such as supply unit.In addition, need shielding,, thereby increased cost such as shielding conductor, barricade or radome in order to prevent leakage flux.

Shown in figure 21; When center pillar 41 has avette or during oval cross section; Because in the whole periphery of center pillar, between center pillar 41 and the column jacket 42 is constant at interval, so; Between the column jacket of the left and right sides, be (G7=G8) that equates with interval G8 at secondary rolling thread terminal board 46 places at the interval G7 at elementary winding terminal daughter board 45 places.

In recent years, because electronic equipment such as household appliances has had multiple function, the secondary rolling thread that is comprised increases, and the secondary rolling thread end that is used for guiding into the terminal 50 secondary rolling thread terminal boards 46 that are connected with secondary rolling thread is to increasing.In Figure 21, with the secondary rolling thread end to 52 guide secondary rolling thread terminal board 46 into left and right end portions, the result, secondary end to 52 and the column jacket 42 of magnetic core 40 between insulation distance d not enough.Therefore, with tubing or adhesive plaster the secondary end at column jacket 42 places is coated with 52 and insulate, this makes and is used for the right complex structure of exit.This makes and must spend the terminal 50 that many times connect coiling and end centering, so, operating efficiency is reduced.

Consider the problems referred to above, shown in figure 22, be set at (G7＜G8) at the interval G8 between secondary rolling thread terminal board 46 place's column jackets 42 greater than the interval G7 between elementary winding terminal daughter board 45 place's column jackets 42.Yet, because the interval between column jacket 42 and the center pillar 41 is not a steady state value, magnetic flux be tending towards concentrating on center pillar 41 and column jacket 42 relative near the zone.As a result, be easy to take place magnetic saturation, and, in converter transformer, under the overlapping state of direct current and alternating current, make its overlapping deterioration in characteristics.

In the above instance of correlation technique, disclosed vertical transformer, wherein, center pillar 41 or column jacket 42 vertically protrude from substrate, yet the problems referred to above also are present in FERRITE CORE and are parallel in the horizontal type transformer that substrate installs.

Summary of the invention

Consider the problems referred to above; According to the present invention, its objective is provides a kind of FERRITE CORE, wherein; The circuit element that influenced by leakage flux reliably is bordering on the FERRITE CORE of forming the coiling element and places; And make electric or electronics miniaturization, and, a kind of transformer that adopts this FERRITE CORE.

In addition; The purpose of this invention is to provide a kind of FERRITE CORE, be set at interval, and coiling and column jacket are insulated reliably greater than opposite side through interval with a side between the column jacket; Prevent the concentration of local and the performance degradation of magnetic flux, thereby and make the FERRITE CORE miniaturization.Provide that a kind of to use the transformer of this FERRITE CORE also be the object of the invention.

According to the present invention, a kind of FERRITE CORE comprises: end face portion, a pair of column jacket that protrudes from the end face portion both sides and the center pillar that protrudes from the end face portion between a pair of column jacket.

With the perpendicular direction of the subtend direction of column jacket on, with the width setup that is close to center pillar one end for less than width near the other end.

A kind of FERRITE CORE according to the present invention has roughly oval cross-section.

A kind of transformer according to the present invention comprises this FERRITE CORE.

According to the present invention, a kind of FERRITE CORE comprises: end face portion, a pair of column jacket that protrudes from the end face portion both sides and the center pillar that protrudes from the end face portion between a pair of column jacket.

In this FERRITE CORE, the direction of being aligned in the column jacket 3 and the position of center pillar 4 each end is defined as X-direction, and the direction vertical with the X axle then is defined as Y direction.False origin is the center of Y direction, measures respectively from two positions of initial point same distance at both direction, and center pillar has different widths W1 and W2 on X-direction, and is asymmetric about the X axle.The wide side place of center pillar on X-direction, the interval between the column jacket is greater than the interval at opposition side.

The center pillar of this FERRITE CORE preferably has avette or the cross section of U-shaped roughly.

According to the present invention, a kind of transformer (vertical transformer) comprising: a pair of FERRITE CORE with oval cross-section, and the bobbin that is used to make this FERRITE CORE combination.This bobbin has the tubulose reel that wherein is inserted with center pillar, and this reel has oval cross-section, and has around the coiling on it.Elementary wire wrap terminal and secondary rolling thread terminal relatively are installed in one of the bobbin the reel vertically narrow side and the wide side of end respectively.Center pillar through with FERRITE CORE inserts in the reel, and the column jacket of one of FERRITE CORE is placed between elementary wire wrap terminal and the secondary rolling thread terminal, and FERRITE CORE is combined with bobbin.

In addition, according to the present invention, a kind of transformer (horizontal type transformer) comprising: a pair of FERRITE CORE with U-shaped cross-section, and the bobbin that is used to make the FERRITE CORE combination.This bobbin has the tubulose reel that wherein is inserted with center pillar, and this reel has U-shaped cross-section, and have the coiling be wrapped in around it.Elementary wire wrap terminal and secondary rolling thread terminal are installed in two of the bobbin the reel vertically narrow side and the wide sides of end respectively.Insert in the reel through center pillar FERRITE CORE; And the wide side of the column jacket of one of FERRITE CORE is placed on elementary winding terminal daughter board place; And the wide side of the column jacket of another FERRITE CORE is placed on secondary rolling thread terminal board place, this FERRITE CORE is combined with this bobbin.

In addition; In in the transverse side of the end face of the opposition side of the center pillar projecting surface of FERRITE CORE and column jacket projecting surface at least one; Formation can be distinguished the recess of FERRITE CORE direction; Perhaps the bight that can see from the part of FERRITE CORE end face, form or form separately R face, C face or the stage portion that can distinguish the FERRITE CORE direction with this recess.

In FERRITE CORE according to the present invention; Since with the perpendicular direction of the subtend direction of column jacket on; The width setup that is close to center pillar one end is less than the width near the other end; Compare with the other end, the leakage flux outside from narrow end reduces, and can circuit element be placed on narrow end contiguously.So, use the coiling element that combines with this FERRITE CORE, can make electric and electronics miniaturization.Need not be used to protect the contiguous circuit element of placing to avoid the shielding of leakage flux influence, can make device miniaturization equally.

Because transformer according to the present invention comprises according to FERRITE CORE of the present invention, so, can be close in the transformer fe ferrite core the narrow end of column jacket and place circuit element.Therefore, can make the electric and electronics miniaturization that adopts this transformer, and not need shielding, in addition, can make equipment compacter, and can be significantly reduced to this.

According to this FERRITE CORE, center pillar has avette or U-shaped cross-section, and on the subtend direction of column jacket, about passing the straight line of initial point on the center pillar Y axle, this cross section is asymmetric.So, at the wide side of directions X center pillar place, the interval between center pillar and the column jacket less than between them at the interval at narrow side place.Even under the interval between the wide side of center pillar place's center pillar and the column jacket was set at greater than the situation at the interval of opposite side, in the periphery of whole center pillar, this was steady state value at interval.Therefore, even in transformer, use this FERRITE CORE, the magnetic saturation that the concentration of local owing to magnetic flux causes can not take place yet, and the transformer retention performance, and can make its miniaturization.

Because at least one in the interval between the column jacket is bigger, so, make from this end of drawing at interval increasing.In addition, can use multi cord, and can increase the quantity and the line footpath of coiling, thereby save copper, and the transformer that has high efficiency and export big electric current is provided.In addition, the end of drawing increase from the wide interval between the column jacket is to, thick line or multi cord, therefore do not need tubing or adhesive plaster to make between winding terminal pair and the column jacket and insulate.The same operating efficiency that improves.

In vertical transformer according to the present invention, the secondary terminal plate is installed in the wide side place between the column jacket, so it is right that the zone that has formed broad is used to draw a large amount of secondary ends.As stated, magnetic saturation can not take place, and transformer keeps its performance and can make its miniaturization.Equally, be suitable for the thick line and the multi cord of secondary rolling thread through use, and the quantity through increasing secondary rolling thread is with in response to the requirement to new electronic equipment, transformer can increase output capacity, and exit is right easily.

In horizontal type transformer, it is right that a kind of zone is used at elementary and the two exit of secondary rolling thread terminal board, so, obtaining identical as stated effect, and primary side pair and column jacket are insulated reliably, secondary end is to also being like this.

Description of drawings

Fig. 1 is the vertical view of the execution mode of magnetic core according to the present invention;

Fig. 2 is the front view of Fig. 1;

Fig. 3 is the front view that diagram comprises the execution mode of the transformer of magnetic core among Fig. 1 and Fig. 2;

Fig. 4 is the end view of the transformer among Fig. 3;

Fig. 5 is the rearview of the transformer among Fig. 3;

Fig. 6 is the end view of the layout of transformer on printed circuit board (PCB) in the pictorial image 3 to Fig. 5;

Fig. 7 A to Fig. 7 D is the vertical view of another execution mode of the center pillar in magnetic core according to the present invention;

Fig. 8 A and Fig. 8 B are the vertical views of another execution mode of the column jacket in magnetic core according to the present invention;

Fig. 9 is the vertical view of diagram according to the execution mode of magnetic core of the present invention;

Figure 10 is the end view of Fig. 9;

Figure 11 is the front view of execution mode of the vertical transformer of the diagram magnetic core that comprises Fig. 9 and Figure 10;

Figure 12 is the end view of the transformer among Figure 11;

Figure 13 is the rearview of the transformer among Figure 11;

Figure 14 is the cutaway view of the transformer among Figure 11;

Figure 15 is the vertical view of diagram according to another execution mode of magnetic core of the present invention;

Figure 16 is the vertical view of diagram according to another execution mode of magnetic core of the present invention;

Figure 17 is to use the front view of the used bobbin of horizontal type transformer of magnetic core among Figure 15;

Figure 18 is the vertical view of the execution mode of the diagram horizontal type transformer that uses magnetic core and the bobbin among Figure 17 among Figure 16;

Figure 19 is the end view of the transformer among Figure 18;

Figure 20 is the upward view of the transformer among Figure 19;

Figure 21 is the cutaway view of the transformer in the correlation technique;

Figure 22 is the vertical view of magnetic core variation pattern in the diagram correlation technique;

Figure 23 is the vertical view of magnetic core in the diagram correlation technique;

Figure 24 is the front view of the execution mode of bobbin according to the present invention;

Figure 25 is the end view of Figure 24;

Figure 26 is the rearview of Figure 24;

Figure 27 is the cutaway view of the E-E line in Figure 26;

Figure 28 is to use the front view of Figure 24 to the transformer of bobbin shown in Figure 26;

Figure 29 is the end view of the transformer of Figure 28;

Figure 30 is the end view that diagram is wrapped in the winding silk mode of operation on the bobbin;

Figure 31 is the cutaway view of the F-F line in Figure 30;

Figure 32 is the cutaway view of diagram according to another execution mode of bobbin of the present invention;

Figure 33 is the cutaway view of diagram according to the another execution mode of bobbin of the present invention;

Figure 34 is the cutaway view of diagram according to the another execution mode of bobbin of the present invention;

Figure 35 is the cutaway view of diagram according to the another execution mode of bobbin of the present invention;

Figure 36 is the cutaway view of diagram according to the another execution mode of bobbin of the present invention;

Figure 37 is the cutaway view of diagram according to the another execution mode of bobbin of the present invention;

Figure 38 is the rearview of diagram according to the another execution mode of bobbin of the present invention;

Figure 39 is the end view of the bobbin of Figure 38;

Figure 40 is the vertical view of diagram according to the execution mode of magnetic core of the present invention;

Figure 41 is the end view of Figure 40;

Figure 42 is the upward view of Figure 40;

Figure 43 is to use the front view to the vertical transformer of the magnetic core of execution mode shown in Figure 42 according to Figure 40;

Figure 44 is the end view of the transformer of Figure 43;

Figure 45 is the rearview of the transformer of Figure 44;

Figure 46 is the figure of diagram according to magnetic flux distribution in this execution mode magnetic core;

Figure 47 A to Figure 47 C is the figure of diagram recess shape of cross section;

Figure 48 is the upward view of diagram according to the another execution mode of magnetic core of the present invention;

Figure 49 is the upward view of diagram according to the another execution mode of magnetic core of the present invention;

Figure 50 is the upward view of diagram according to the another execution mode of magnetic core of the present invention;

Figure 51 is the upward view of diagram according to the another execution mode of magnetic core of the present invention;

Figure 52 A to Figure 52 C is the figure that is shown in the shape of cross section instance of the direction identification part that the corners of the magnetic core according to the present invention is provided with;

Figure 53 is the upward view of diagram another execution mode of magnetic core according to the present invention;

Figure 54 is to use the front view according to the horizontal type transformer of the magnetic core of execution mode shown in Figure 40 to 42; And

Figure 55 is the end view of the transformer of Figure 54.

Embodiment

[first execution mode]

Fig. 1 is the vertical view of diagram execution mode of FERRITE CORE according to the present invention, and Fig. 2 then is the front view of this FERRITE CORE.FERRITE CORE 1 has end face portion 2, from a pair of column jacket 3 of end face portion 2 protrusion and from the center pillar 4 of 2 protrusions of the end face portion between a pair of column jacket 3.The direction of aligning when column jacket 3 and each end position of center pillar 4 is defined as X-direction, and the direction vertical with the X axle then is defined as Y direction.In two ends of Y direction, be close to the width W 1 width of the end predetermined distance L1 place of upside (among the Fig. 1 from) of end 4a less than the width W 2 at 4b same distance L1 place (W1＜W2) from the other end.In according to of the present invention execution mode, center pillar 4 has oval cross-section.Column jacket 3 has constant width in Y direction.

Fig. 3 is the front view that illustrates the execution mode of the vertical transformer that comprises FERRITE CORE 1, and Fig. 4 and Fig. 5 then are respectively the end view and the rearviews of the transformer among Fig. 3. Label 5,6,7,8 and 9 is represented bobbin, reel, elementary winding terminal daughter board, secondary rolling thread terminal board respectively and at the flange at reel 6 tops.Label 10 is illustrated in the coiling around the reel 6, has adhesive tape in the coiling periphery, and comprises elementary coiling and secondary rolling thread.Label 11,12,13 and 14 represent respectively primary side to, secondary end to, the secondary rolling thread terminal that is fixed in the elementary wire wrap terminal of elementary winding terminal daughter board 7 and is fixed in secondary rolling thread terminal board 8.

Reel 6 has and the corresponding oval cross-section of the shape of center pillar 4, and center pillar 4 inserts in the reel 6.To shown in Figure 5, elementary winding terminal daughter board 7 is installed on the end of reel 6 on it is axial with secondary rolling thread terminal board 8 like Fig. 3.Secondary rolling thread terminal board 8 is arranged on the 4b place, wide end of center pillar 4 in the FERRITE CORE 1, and elementary winding terminal daughter board 7 is arranged on 4a place, narrow end.

In the assembly of bobbin 5 and magnetic core 1; Each center pillar 4 of a pair of magnetic core 1 inserts in the reel 6, and the column jacket 3 of a magnetic core 1 places between elementary winding terminal daughter board 7 and the secondary rolling thread terminal board 8, and; Through clinging around it with adhesive tape or using adhesive, make the magnetic core 1 of combination fixed to one another.

According to this configuration, as shown in Figure 1, because electric current is through winding the line 10 and in the leakage flux that in magnetic core 1, causes, the leakage flux φ 2 that the leakage flux φ 1 at 4a place, narrow end locates less than the other end.

As shown in Figure 6; When the transformer that will comprise FERRITE CORE 1 21 and other circuit elements 22 and 23 are installed in 20 last times of printed circuit board (PCB); The circuit element that influenced by leakage flux 22 (such as integrated circuit component) is positioned over the narrow end 4a of center pillar 4; And the circuit element 23 that will not be subject to the leakage flux influence relatively is positioned over wide end 4b, thereby reduces the influence that causes owing to leakage flux φ 1 and φ 2.Place through circuit element 22 and 23 being close to transformer 21, make Electrical and Electronic equipment (such as the Switching Power Supply that comprises printed circuit board (PCB) 20, transformer 21 or circuit element 22 and 23) miniaturization.In addition, need therefore,, except miniaturization, can also not reduce cost to the shielding of circuit element 22 as far as Electrical and Electronic equipment.

Particularly, in digital device, in the employed wiring diagram or integrated circuit component that relates to video and audio signal, preferably reduce noise effect as far as possible.In the case, be close to circuit element 22 placement wiring diagrams or integrated circuit component and can reduce noise effect.When being close to hard disk unit or optic pick-up when placing transformer, through device being placed on the zone that produces leakage flux φ 1, that is leakage flux can reduce the noise effect that causes owing to transformer than other regional little zones.

Fig. 7 is the vertical view of other execution modes of center pillar.The cross section of Fig. 7 A diagram center pillar 40, wherein wide end 40b is cut into straight line, and narrow end 40a does not then have.The cross section of Fig. 7 B diagram center pillar 41, wherein narrow end 41a is a chevron, wide end 41b then is a polygon.In Fig. 7 C, the narrow end 42a of center pillar 42 is the arcs with small curvature radius, and wide end 42b then is the arc with larger radius of curvature.In Fig. 7 D, center pillar 43 has the conglobate triangular cross section in summit, and top, angle 43a is narrow end, and bottom 43b is wide end.Under various situation,, can obtain to comprise the effect identical of miniaturization with previous execution mode through closely placing circuit element.

Fig. 8 is the vertical view that is shown in according to other execution modes of the column jacket in the magnetic core of the present invention.Column jacket is formed FERRITE CORE with center pillar shown in Fig. 1 and Fig. 74 and center pillar 40 to 43.In Fig. 8 A, and the interval W3 between corresponding column jacket 30 ends, narrow end (that is end 30a) of center pillar 4 one of (or center pillar 40 to 43), less than (the W3＜W4) of the interval W4 between other end (30b).In Fig. 8 B, the interval W5 between the middle part 31a of column jacket 31 is greater than (the W5＞W6) of the interval W6 between two end 31b.Shown in Fig. 8 A, narrow through the interval between the corresponding column jacket 30 end 30a in narrow end that dispose feasible and center pillar, leakage flux φ 1 is especially reduced, and can obtain circuit element 22 is close to the Electrical and Electronic device of the more miniaturization of other elements.

When application is of the present invention, can place the cross section of center pillar 4 and center pillar 40 to center pillar 43 about the Y axle at a certain angle, and the end of center pillar 4 and center pillar 40 to center pillar 43 can have the shape identical with 2b with the end face 2a of end face portion.

[second execution mode]

Fig. 9 is the vertical view of diagram FERRITE CORE execution mode according to the present invention, and Figure 10 then is the end view of FERRITE CORE.FERRITE CORE 101 has end face portion 102, from a pair of column jacket 103 of end face portion 102 protrusion and from the center pillar 104 of 102 protrusions of the end face portion between a pair of column jacket 103.The direction of being aligned in the column jacket 103 and the position of each end of center pillar 104 is defined as X-direction, and the direction vertical with the X axle is defined as Y direction.False origin O is the center of Y direction; Respectively; Measure with two positions of-Δ y from initial point equidistance+Δ y at both direction, center pillar 104 has different widths W1 and W2 (W1＜W2), and having about the asymmetric oval cross-section of X axle on X-direction.Therefore, the interval G2 between the 104 wide side place column jackets 103 of center pillar on the X-direction is greater than the G1 (G1＜G2) at the interval at opposite side place.

Cross section at aforesaid center pillar 104 is under the asymmetric situation; Even the interval G2 between the wide side of center pillar place column jacket 103 is greater than the interval G1 at opposite side place; In the whole periphery of center pillar 104, also can the interval between center pillar 104 and the column jacket 103 be set at constant.So, even in transformer, use this FERRITE CORE, can not take place because the magnetic saturation that the concentration of local of magnetic flux causes yet, and its characteristic of transformer maintenance, and make its miniaturization.When the situation when having avette or oval cross section with center pillar 121 shown in figure 21 is compared, can make that the width in wide side reduces between the column jacket 103,, and realize the miniaturization magnetic core so magnetic core 101 can be less at the width of X-direction.

Because at least one is at interval, that is the interval G2 between column jacket 103 at least one ends, greater than the interval of the other end, so, can increase from the right quantity of this end of drawing at interval.Can use multi cord, and can increase the quantity and the line footpath of coiling, thereby practice thrift copper and the transformer with high efficiency and High Output Current is provided.As stated, the end that is increased is drawn from the wide interval between the column jacket, thick line or multi cord, therefore realizes insulation easily.

Figure 11 is the front view that illustrates the execution mode of the vertical transformer that comprises FERRITE CORE 101, and Figure 12, Figure 13 and Figure 14 then are respectively end view, rearview and the cutaway views of execution mode among Figure 11.Label 105,106,107,108 and 109 is represented the flange at bobbin, reel, elementary winding terminal daughter board, secondary rolling thread terminal board and reel 106 tops respectively.Label 110 expression coiling, its be wrapped in reel 106 around, have adhesive tape in the coiling periphery, and comprise elementary coiling and secondary rolling thread.Label 111,112,113 and 114 represent respectively primary side to, secondary end to, the secondary rolling thread terminal that is fixed in the elementary wire wrap terminal of elementary winding terminal daughter board 107 and is fixed in secondary rolling thread terminal board 108.

Shown in figure 14, reel 106 has and the corresponding asymmetric oval cross-section of the shape of center pillar 104, and center pillar 104 is inserted in the reel 106.Like Figure 11 to shown in Figure 13, elementary winding terminal daughter board 107 and secondary rolling thread terminal board 108 reel 106 axially on be installed on the one of which end.Shown in figure 14, secondary rolling thread terminal board 108 is positioned at the wide side of reel 106, and elementary winding terminal daughter board 107 then is positioned at the narrow side relative with it.

In the assembly of bobbin 105 and magnetic core 101; Each center pillar 104 of a pair of magnetic core 101 inserts in the reel 106; The column jacket 103 of a magnetic core 101 places between elementary winding terminal daughter board 107 and the secondary rolling thread terminal board 108; And, through clinging around it with adhesive tape or using adhesive, make the magnetic core 101 of combination fixed to one another.

According to this configuration, shown in figure 14, at the secondary end that comprises a large amount of coilings to the width G 2 between 112 the outlet side place column jacket 103, greater than at primary side to the width G 1 between the 111 outlet side place column jackets 103.So, at the width ' a ' of the lead division 115 at elementary winding terminal daughter board place, less than at the width ' b ' of the lead division 116 at secondary rolling thread terminal board 108 places (a＜b), thereby secondary end is drawn 112 easily.In addition, with primary side to 111 and column jacket 103 between insulation distance ' c ' similar, also limit fully the outermost secondary end to 112 and column jacket 103 between insulation distance ' d '.Therefore, need not use tubing or adhesive tape come to the outermost secondary end to 112 and column jacket 103 between insulate, this makes secondary end be connected easily with secondary rolling thread terminal 114 112.

Be used for secondary end to 112 lead division 116 broads, secondary end is increased 112.Can use multi cord, and, can increase the quantity and the line footpath of secondary rolling thread, thereby practice thrift copper, and the transformer with high efficiency and output HIGH current is provided.

Figure 15 is the vertical view of the another execution mode of magnetic core according to the present invention.In this execution mode, center pillar 104A protrudes from end face 102A, and has the general triangular cross section.Similar with previous execution mode, the interval G4 between a side column jacket 103A is wider than the G3 at the interval of opposite side, thereby reaches identical effect.

Figure 16 is the vertical view of the another execution mode of magnetic core according to the present invention.In this execution mode, magnetic core 120 is preferably to be used in horizontal type transformer, and center pillar 121 is positioned at a side of end face portion 122.In this embodiment, the direction of being aligned in the column jacket 123 and the position of each end of center pillar 121 is defined as X-direction, and the direction vertical with the X axle is defined as Y direction.False origin O is the center of Y direction; Respectively; Measure with two positions of-Δ y from initial point equidistance+Δ y in the opposite direction, center pillar 121 has different widths W3 and W4 (W3＜W4), and have the cross section about the asymmetric semicircle of X axle on X-direction.Therefore, the interval G6 between the 121 wide side place column jackets 123 of center pillar on the X-direction is greater than the G5 (G5＜G6) at the interval at opposite side place.

Figure 17 be with Figure 16 in magnetic core 120 combine and be used for the front view of the bobbin of horizontal type transformer.Figure 18 is the vertical view that comprises the horizontal type transformer of the magnetic core 120 among bobbin 124 and Figure 16, and Figure 19 and Figure 20 then are respectively the end view and the upward views of transformer.Horizontal type transformer satisfies the needs to lower (approach) unit, so bobbin 124 has center pillar 121 insertions tubulose reel 126 wherein, and will wind the line and 125 be wrapped in around the reel, and reel 126 has the U-shaped cross-section corresponding with center pillar 121.Two longitudinal end places at the reel 126 of bobbin 124; Elementary winding terminal daughter board 128 and secondary rolling thread terminal board 130 are set; Elementary winding terminal daughter board 128 in reel 126 wide sides has elementary wire wrap terminal 127, and secondary rolling thread terminal board 130 has secondary rolling thread terminal 129.When the center pillar 121 with a pair of magnetic core 120 inserts in the reel 126; Make the wide side of two column jackets 123 of a magnetic core 120 be positioned at elementary winding terminal daughter board 128 places; And the wide side that makes two column jackets 123 of another magnetic core 120 is positioned at secondary rolling thread terminal board 130 places, thereby magnetic core 120 and bobbin 124 are combined.Through clinging around it with adhesive tape or using adhesive, can make magnetic core 120 fixed to one another.

In the above-described embodiment; Because form the interval G6 of secondary end between the column jacket of figure top to 132 lead division; Greater than the interval G5 of bottom primary side to 131 lead division; So in elementary winding terminal daughter board 128 and secondary rolling thread terminal board 130, end is enough wide to 132 lead division with end to 131.In the case, the interval between center pillar 121 and the column jacket 123 also is a constant in the periphery of whole center pillar.As a result, except that preventing magnetic saturation and deterioration in characteristics and realizing the miniaturization, can output capacity increased through thick secondary winding and multi cord, perhaps, through increasing the quantity of secondary rolling thread, response be held right demand and is used the right lead-in wire of this end new one.

Equally, except that secondary rolling thread, under the situation that increases elementary coiling quantity, also can reach above-mentioned effect same, and realize having the transformer of different output voltages easily.

[the 3rd execution mode]

Figure 24 to Figure 26 is respectively front view, end view and the rearview of bobbin the 3rd execution mode according to the present invention, and Figure 27 is the cutaway view of the E-E line in Figure 26.These execution modes illustrate a kind of vertical transformer, wherein, only on a side guard plate 203 of backplate 203 and 204, terminal board 207 and 208 are set, and primary side terminal 205 and primary side terminal 206 are installed on the terminal board.Backplate 203 and 204 is formed at the two ends of reel 202, and reel 202 is used for winding around on bobbin 201.

In Figure 27, O representes the vertical and horizontal central point of reel 202.Here, with the cross section of the perpendicular direction of the cavity of reel 202 volume core in, the center line of terminal board 207 and 208 subtend directions is the Y axle, the center line with the perpendicular direction of subtend direction of terminal board in this cross section then is the X axle.At this moment, in this execution mode, form like this, make that a zone 210 that is divided into by the X axle is asymmetric with another cross section of regional 211.In this execution mode, the cross section of the cavity of reel 202 (also comprising its periphery) forms avette.

Figure 28 is the front view that diagram is used the transformer instance of this bobbin formation, and Figure 29 is the end view of Figure 28.This transformer uses two E type magnetic cores 212 being processed by Ferrite Material.Magnetic core 212 comprises end face 213, a pair of column jacket 214 and center pillar 215.A pair of column jacket 214 is set to the two ends protrusion from end face 213, and, between a pair of column jacket 214, center pillar 215 is set so that it is from end face 213 protrusions.Here, center pillar 215 forms asymmetric shape, conforms to the shape of cross section with reel 202 cavitys.

Coil 216 is wrapped on the reel 202, and twines adhesive tape in its periphery.Coil 216 comprises primary coil and secondary coil.As stated; Each center pillar 215 of a pair of magnetic core 212 reel 202 with respect to bobbin 201 is inserted; In this bobbin; Coil 216 is wrapped on the reel 202, and column jacket 214 is fitted in the terminal board 207 that is used for the primary side terminal and between the terminal board 208 that is used for the primary side terminal, so that magnetic core 212 combines with bobbin 201.Through twine with the adhesive tape (not shown) or adhesive bonding, with coil stationary on the periphery of the magnetic core 212 that combines.

Figure 30 is the end view of illustrated operation state, wherein bobbin 201 is placed on the spool 221 of coil winding machine 220, and on bobbin winding around, and Figure 31 is the cutaway view along the F-F line among Figure 30.Like Figure 30 and shown in Figure 31, the cross section of spool 221 forms the consistent shape of reel 202 cavitys with bobbin 201.When utilizing coil winding machine 220 to carry out winding operation; The reel 202 of bobbin 201 is fitted in the spool 221; In this spool, confirm the initial, set position of rotation direction in advance, coiling is tied in primary side terminal 205 and the primary side terminal 206, and spool 221 is rotated.Thus, on reel 202, twine.According to the needs of writhing number in the transformer, carry out repeatedly this winding process.In winding process repeatedly, the initial, set position of spool 221 rotation directions can differ from one another.

When carrying out winding process as stated, because the peripheral shape of reel 202 becomes about the asymmetric shape of X axle, so, easily the position of the rotation direction of bobbin 201 is distinguished through visualization.Thus, easily bobbin 201 is placed on the spool 221, and improves operating efficiency.

In addition, when the cavity of spool 221 according to the present invention and bobbin 201 reels 202 forms about the asymmetric shape of X axle,, then can't place bobbin 201 if the direction of the direction of the reel 202 of bobbin 201 and spool 221 does not match.Therefore, when bobbin 201 is positioned over spool 221, confirmed the direction of bobbin 201 automatically, and can avoid wrong and place.

In addition, because the initial, set position of the rotation direction of spool 221 is constant, so the initial, set position of terminal board 207 and 208, primary side terminal 205 and primary side terminal 206 rotation directions also is constant.Therefore, can avoid coil terminals and object terminal not to match.Also can avoid the aforesaid operations error in sealing impression, measurement and the installation on substrate.As a result, in transformer is made, boost productivity.

With reference to Figure 27, dispose the cavity of reel 202 like this, make Y direction be set at the broad width, the direction of X axle then is set at narrower width.Yet, also can dispose like this, make the X axle equate with the width of Y direction, the perhaps direction narrow width of Y axle, and the direction width of X axle is wide.In addition, the cavity of reel 202 or periphery also can dispose like this, make two zones being cut apart by the X axle form asymmetric shape, and also form asymmetric shape by two zones that the Y axle is cut apart.

Figure 32 to Figure 37 is respectively the cutaway view of diagram according to other execution modes of bobbin of the present invention.In Figure 32 to Figure 37, represent identical part with those identical among Figure 27 labels.In Figure 32, the cavity of reel 202A (the same with periphery) is divided into a regional 210A and another regional 211A respectively by the X axle.A regional 210A forms arch, and another regional 211A forms rectangle.Therefore, two regional 210A and 211A are asymmetric shapes.

In Figure 33, the cavity of reel 202B (the same with periphery) is divided into a regional 210B and another regional 211B respectively by the X axle.A regional 210B forms dihedral, and another regional 211B forms rectangle.Therefore, two regional 210B and 211B are asymmetric shapes.

In Figure 34, the cavity of reel 202C (the same with periphery) is divided into a regional 210C and another regional 211C respectively by the X axle.The top of a regional 210C and another regional 211C forms arc, and the radius of curvature of arc differs from one another.Therefore, two regional 210C and 211C are asymmetric shapes.

In Figure 35, the cavity of reel 202D (the same with periphery) is divided into a regional 210D and another regional 211D respectively by the X axle.Its cross section integral body forms triangle.Therefore, two regional 210D and the 211D cut apart by the X axle are asymmetric shapes.

In Figure 36, the cavity of reel 202E (the same with periphery) is divided into a regional 210E and another regional 211E respectively by the X axle.Two regional 210E and 211E are asymmetric shapes, and also are asymmetric shape each other by two zones that the Y axle is divided into.In addition, under any situation of being divided by the cut-off rule of direction or position, two zones that are divided into also all are asymmetric shape each other.

In Figure 37, with vertically being set at the Y axle in the cross section of avette reel 202F, and the Y axle forms inclination with respect to the subtend direction of terminal board 207 and terminal board 208.

Effect according in the execution mode of the effect of each execution mode of Figure 32 to Figure 37 and Figure 24 to Figure 31 is identical.

Figure 38 is the rearview of diagram another execution mode of bobbin according to the present invention, and Figure 39 is the end view of the bobbin of Figure 38.Bobbin 223 uses in horizontal type transformer.Configuration bobbin 223 makes primary side terminal board 227 and primary side terminal board 228 be arranged on the protrusion 225 and 226 places at reel 224 two ends like this.Through this configuration, on unshowned substrate, form installed surface 229.

In Figure 38, O representes the vertical-horizontal center point of the cavity of reel 224.Rolling up in the perpendicular cross section of core direction, be the Y axle with installed surface 229 vertical center lines with the cavity of reel 224.In addition, be the X axle with installed surface 229 parallel center lines.At this moment, the cross section of reel 224 cavitys is formed, the cross section in a zone 230 of reel 224 cavitys that are divided into by the X axle and the cross section in another zone 231 form asymmetric shape.

In the execution mode of Figure 38 and Figure 39, transformer configuration does, makes coil be wrapped on the reel 224, and the center pillar of E type magnetic core is injected in the reel 224, and column jacket then is positioned at the coil both sides.

In the execution mode relevant with the horizontal type transformer of Figure 38 and Figure 39; And in the execution mode shown in Figure 24 to 37; Can obtain following effect; Raising, operate miss such as operating efficiency reduce, and the raising of the productivity ratio in each production process (such as impression, measurement and the installation on substrate of sealing).

In addition, in this horizontal type transformer, two zones of the cavity of the reel 224 that is divided into by the Y axle also can form asymmetric shape.Equally, in this case, also can obtain effect such as the raising and the operate miss minimizing of operating efficiency.In addition, in horizontal type transformer, two zones of the cavity that is divided into by X axle and Y axle respectively can form asymmetric shape.Two zones of reel 224 peripheries that are divided into by X axle and Y axle respectively in addition, also can form asymmetric shape.

[the 4th execution mode]

Figure 40 to Figure 42 is respectively vertical view, end view and the upward view of diagram according to the 4th execution mode of FERRITE CORE of the present invention.In Figure 40, magnetic core 301 is E type magnetic cores, has the center pillar 304 of center to protrude that is formed on end plate 302 one sides, and is formed on the column jacket 303 of two ends with protrusion.O representes the vertical-horizontal center point of magnetic core 301.

Here, with the cross section of the perpendicular direction of center pillar 304 volume cores in, describe like hereinafter, the center line of terminal board 311 and 312 (referring to Figure 43 to Figure 45) subtend direction is the Y axle, and is the X axle with the center line of the perpendicular direction of terminal board subtend direction in the cross section.At this moment, in this execution mode, as shown in Figure 40, cross section forms, and makes that cross section is asymmetric by upper area 304a and the lower area 304b that the X axle is divided into.The zone is a symmetric shape about the center pillar 304 that is divided into by the Y axle in addition.That is the quantity of symmetry division line is one.In this execution mode, the cross section of center pillar 304 has approximate avette shape.Two the regional 303a and the 303b of the column jacket 303 that is divided into by the X axle in addition, also are asymmetric.

Figure 43 to Figure 45 is to use the instance of the transformer of FERRITE CORE 301 respectively.This execution mode illustrates a kind of vertical transformer, wherein, only on a side guard plate 308 of backplate 308 and 309, terminal board 311 and 312 is set, and primary side terminal 313 and primary side terminal 314 are installed respectively on the terminal board.Backplate 308 and 309 is formed on the two ends of bobbin 305 coilings 306, and reel 306 is wound with coil 310.

Coil 310 comprises primary coil and secondary coil, and with the periphery of adhesive plaster winding around 310.Each center pillar 304 of a pair of magnetic core 301 inserts with respect to the reel of bobbin 305; Coil 310 is wrapped on the reel; And column jacket 303 fitted in the terminal board 311 that is used for the primary side terminal and between the terminal board 312 that is used for the primary side terminal, so that magnetic core 301 is combined with bobbin 305.Therefore, the magnetic core joint portion of reel 306 or backplate 308 and 309 has asymmetric shape, and wherein, center pillar 304 or column jacket 303 make up with asymmetric shape.Bonding through adhesive tape (not shown) or adhesive, with coil stationary on the periphery of the magnetic core 301 of combinations thereof.

Shown in figure 40, in this execution mode, the interval G2 between the column jacket 303 of bottom is longer than the interval G1 between the column jacket 303 on top.That is, even set, making that the interval between column jacket 303 ends relative with center pillar broad width side is longer than the interval of opposite side, center pillar 304 also can be set equidistantly all sides of center pillar with column jacket 303.Therefore, even constitute aforesaid transformer, transformer also can prevent the magnetic saturation that the concentration of local owing to magnetic flux forms, and can prevent the deterioration of characteristic, and can make its miniaturization.

In addition, because enlarged the interval G2 between the end of at least one side column jacket 303, so, can increase the quantity of the coil terminals of extracting out from the part between the column jacket that enlarges.In addition,, and increase the quantity of coil terminals because can use thick line footpath, use multi cord, so, copper loss is reduced.As a result, the transformer that has high efficiency and can export big electric current can be provided.In addition, because extract coil terminals or thick line or the multi cord that is increased out from the part between the column jacket 303 that enlarges, so, the tubing or the adhesive plaster that need not insulate to the gap between coil terminals and the column jacket 303, and can help to improve operating efficiency.

In addition, in vertical transformer,, can guarantee to make the zone of a plurality of secondary coil terminals extractions to widen through making that the terminal board 312 that is used for secondary coil can be corresponding than long end with the interval G2 between the column jacket 303 according to this execution mode.Therefore, as stated, this transformer can prevent magnetic saturation, performance degradation, and can make its miniaturization.In addition, can obtain such transformer, wherein thick line or multi cord are used in secondary coil increasing output capacity, and the quantity through increasing secondary coil is to satisfy the requirement of new equipment easily.As a result, extract coil terminals easily out.

Shown in figure 42, according to this execution mode, in the end plate 302 of magnetic core 301,, form poroid recess 317 protruding among the opposite end face 302a of one side with center pillar 304 or column jacket 303.Recess 317 is direction identification divisions, is positioned at an end of center pillar 304 and column jacket 303, is used for difference and whether has large tracts of land cut zone 304b (or small size cut zone 304a), that is distinguish the two ends that are divided into by the X axle as cut-off rule.In this execution mode, recess 317 is arranged on the Y axle and is positioned at the upside (center pillar 304 has large-area cut zone 304b side) that is higher than central point O, so that it places upper position.In addition, according to this execution mode, recess 317 is circular, but also can be other shapes such as square.

Figure 46 is shown in zone with low magnetic flux density 318 that is produced by coil 310 in the magnetic core cross section and the zone 319 with high magnetic flux density.Two FERRITE COREs 301 are bonded to each other as transformer.In Figure 46, have on the large-area end, at end face 302a center, recess 317 is set.That is the position in the zone that does not have high magnetic flux density 319 with certain depth, forms recess 317.

Shown in Figure 47 A, Figure 47 B and Figure 47 C, the cross section of recess 317 can form rectangle, circle, triangle etc. any one.Can be in magnetic core 301 moulding or afterwards, through cutting recess 317 is provided.

In the assembling of the transformer that uses magnetic core 301; When the reel that makes bobbin 305 306 is arranged with vertical mode; And, when from the top magnetic core 301 being installed, clearly be visually observed the cross-wise direction of center pillar 304 with the column jacket 303 of magnetic core according to recess 317 through facing toward its end plate 302.Therefore, when magnetic core 301 is installed on bobbin 305, need not through make magnetic core put upside down (promptly make magnetic core center pillar 304 and column jacket 303 the top up) confirm cross-wise direction.As a result, operating efficiency is improved.

In addition, on the sidepiece 303c of magnetic core 301 or end plate 302a when print product title or bookmark name, because confirm directions according to recess 317 easily, so, need not confirm direction, thereby improve operating efficiency through putting upside down magnetic core 301.In addition, when sealing impression through automatic printing, need make the cross-wise direction proper alignment of the center pillar 304 or the column jacket 303 of magnetic core.Yet, even in this case, also can easily confirm the cross-wise direction of center pillar 304 or column jacket 303, and improve operating efficiency.Therefore, can prevent to cause sealing the error of impression owing to the difference of direction.

In addition, according to this execution mode, center pillar 304 has asymmetric shape, and a regional 304b and another the regional 304a wherein cut apart by the X axle are respectively wide and narrow.Equally, the zone of being cut apart by the Y axle also can be for asymmetric.

Figure 48 to Figure 52 is respectively the upward view of diagram according to other execution modes of magnetic core of the present invention.In these figure, represent components identical with label identical among Figure 43.In Figure 48,, on Y direction, form flute profile recess 317A at the center of end face 302a.Recess 317A is set, squints with the Y direction outside central point O in end face (upside among Figure 48 or downside).Therefore, only, just can distinguish the direction of center pillar 304 or column jacket 303 through observing this end face.The cross section of recess 317A can form the difformity shown in Figure 47 A, Figure 47 B and Figure 47 C.

In Figure 49, on the bight between end plate 302 and the column jacket 303a, form direction identification division 323, by be shown in C face (inclined-plane 320) among Figure 52 A, be shown in R face (321) among Figure 52 B, or the stage portion (322) that is shown among Figure 52 C constitute.

According to this execution mode; Because according to left side or right side, the position of direction identification division 323 at Figure 49; The position of judging broad width portion 304b or narrower width portion 304a is on the top of Figure 49 or in the bottom; So, can distinguish the cross-wise direction of center pillar 304 or column jacket 303, and need not put upside down magnetic core 301.

In Figure 50, on the external angle of a column jacket 303, form direction identification division 324, constitute by the C face, R face or the stage portion that are shown among Figure 52 A to Figure 52 C.In addition, in Figure 51, on the external angle of the same side of two column jackets 303, form direction identification division 324.Through the direction identification division 323 and 324 that on the bight, forms as stated, can distinguish the cross-wise direction of center pillar 304 or column jacket 303, and need not put upside down magnetic core 301.

Figure 53 is according to another execution mode of the present invention.In Figure 53, on transverse side, form flute profile recess 317B as side's column jacket 303 outer surfaces.That is, below above the X axle or as shown in Figure 53, form flute profile recess 317B.Shown in Figure 53, can on a side or both sides, form recess 317B.According to the execution mode of Figure 53, can distinguish the cross-wise direction of center pillar 304 or column jacket 303, and need not put upside down magnetic core 301.In this execution mode, preferably, recess is formed on the outside of the column jacket 303 broad width side 303a with low magnetic flux density, like this, very little to the influence of transformer characteristic.

Even in any above-mentioned execution mode, because lower or do not have on the position of magnetic flux recess 317,317A and 317B or direction identification division 323 and 324 to be set in magnetic flux density, so, very little to the influence of transformer characteristic.In addition, these recess 317,317A and 317B or direction identification division 323 and 324 can form identical shape or different shapes.

Figure 54 is the front view that diagram is used the another execution mode of core transformers according to the present invention, and Figure 55 is the end view of the transformer of Figure 54.In this horizontal type transformer, bobbin 330 is configured to, and makes primary side terminal board 335 and primary side terminal board 336 be arranged on the backplate 333 and 334 at reel 331 two ends reel 331 winding arounds 332.Through this configuration, on unshowned substrate, form installed surface 337.

In horizontal type transformer, also use Figure 40 to magnetic core 301 shown in Figure 42.O representes the vertical-horizontal center point of magnetic core 301, and is the central point of the center pillar 304 of magnetic core 301.As stated, in cross section, be the Y axle perpendicular to the center line of installed surface 337 perpendicular to magnetic core 301 center pillars 304.In addition, the center line that is parallel to installed surface 337 is the X axle.At this moment, the cross section of center pillar 304 forms, and makes two zones that are divided into by the X axle form asymmetric shape.The cross section of column jacket 303 also is asymmetric by two zones that the X axle is divided into.Even in horizontal type transformer, recess 317,317A and 317B as the direction identification division also can be set, direction identification division 323 and 324 perhaps are set, thereby, in assembly operation, can avoid sealing the error of impression, and improve operating efficiency.

In addition, in this horizontal type transformer, center pillar also can form asymmetric shape by two zones that the Y axle is divided into.Equally, in this case, also can prevent to seal the error of impression, and improve operating efficiency.

Claims (4)

1. bobbin that is used for transformer comprises: the cylindric reel of winding around, and said reel comprises cavity and periphery;

Wherein, When by cut-off rule based on arbitrary direction and position; To be divided into two when regional to perpendicular cross section with the spool shaft of one of cavity and periphery at least; Said two zones are asymmetric, and said spool shaft with cavity and periphery is an oval cross-section to perpendicular cross section.

2. bobbin that is used for transformer comprises: the cylindric reel of winding around, and said reel comprises cavity and periphery;

Wherein, have a symmetry division line with the spool shaft of one of cavity and periphery at least to perpendicular cross section, when by this symmetry division line, said cross section is divided into two when regional, said two zones are symmetrical;

Two zones that are divided into by the cut-off rule outside this symmetry division line are asymmetric, and

Said spool shaft with cavity and periphery is an oval cross-section to perpendicular cross section.

3. bobbin that is used for vertical transformer comprises:

Backplate is formed on the two ends of the cylindric reel of winding around, and said reel comprises cavity and periphery; And

Two terminal boards are installed on one of said backplate, between said two terminal boards, to inject reel;

Wherein, With the spool shaft of one of the cavity of said at least reel and periphery in perpendicular cross section, when the center line of the subtend direction of said two terminal boards is the Y axle, and when being the X axle with the perpendicular center line of the said subtend direction of said two terminal boards; Said cross section is asymmetric by two zones that said X axle is divided into; And/or said cross section is asymmetric by two zones that said Y axle is divided into, and

Said spool shaft with cavity and periphery is an oval cross-section to perpendicular cross section.

4. bobbin that is used for horizontal type transformer comprises:

Backplate is formed on the two ends of the cylindric reel of winding around, and said reel comprises cavity and periphery;

Terminal board is installed in respectively on the said backplate; And

Installed surface is formed on the substrate by said terminal board;

Wherein, With the spool shaft of one of the cavity of said at least reel and periphery in perpendicular cross section, when the center line that is parallel to said installed surface is the X axle, and when being the Y axle perpendicular to the center line of said installed surface; Said cross section is asymmetric by two zones that said X axle is divided into; And/or said cross section is asymmetric by two zones that said Y axle is divided into, and

Said spool shaft with cavity and periphery is an oval cross-section to perpendicular cross section.

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