CN204257341U - A kind of magnetic core and use the magnetic element of this magnetic core - Google Patents

Abstract

The utility model provides a kind of magnetic core, and it has the winding core of column; Base flange portion, this base flange portion is from the installation end face of winding core, and the diametric(al) along winding core extends laterally and formed; And middle flange portion, this middle flange portion extends laterally along the diametric(al) in the cross section parallel with base flange portion and is formed; Winding core has the 1st winding core, and the 1st winding core is between middle flange portion and above-mentioned base flange portion; And the 2nd winding core, the 2nd winding core is positioned at the opposition side relative to middle flange portion; It is characterized by, the diameter of the 1st winding core is longer than the diameter of the 2nd winding core.This magnetic core has simple structure, is easy to manufacture, and is suitable for the advantage of high voltage withstanding magnetic element.Use the magnetic element of this magnetic core can carry out dividing potential drop applied to voltage on the whole by multiple winding block, thus improve overall resistance to pressure.

Description

A kind of magnetic core and use the magnetic element of this magnetic core

Technical field

The utility model relates to a kind of manufacture being suitable for high voltage withstanding magnetic element, and has the magnetic core of simple structure, and employs the magnetic element of this magnetic core.

Background technology

In recent years, LED(Light Emitting Diode, light-emitting diode) replace incandescent lamp up to now and fluorescent lamp to become the lighting apparatus popularized.On the lighting apparatus adopting this kind of LED, be equipped with LED drive circuit.

With regard to relevant LED drive circuit, one of them example, as Japanese document JP 2001-8443 publication (patent documentation 1: hereinafter referred to as " conventional example 1 ") just clearly states.In the LED drive circuit of this conventional example 1, as shown in figure 11, possesses LED element 102, the coil 103 of LED element 102 series connection therewith, and diode element 104, this diode element 104 and LED element 102 and coil 103 state for being connected in parallel.

And, the DC power supply 101 applying pulsating voltage is provided with in this drive circuit, between LED element 102 and DC power supply 101, be also connected with and switch the switch element 105 of DC power supply 101 to the input/non-input of LED element 102 output voltage.

In conventional example 1 as above, when LED drive circuit is connected at switch element 105 time, DC power supply 101 output voltage is applied to LED element 102, make LED element 102 luminous, and when switch element 105 disconnects, utilize the back electromotive force of coil 103, make LED element 102 luminous.

But, in LED drive circuit, because LED element 102 is generally counted as capacity cell, thus the major part of the electric power supplied from DC power supply 101 all consumed by coil 103.The major part of supply voltage carry by this coil 103, its result is particularly the country beyond the Japan of more than 200v in family's supply of electric power, in order to prevent occurring short circuit between the conductive wire of the conductive wire in coil 103 winding termination side and winding beginning side, require that the resistance to pressure of this coil 103 will at 500 ~ more than 600v.

In order to meet relevant resistance to pressure requirement, just there is a kind of technical scheme, wherein winding being divided into multiple windings of isolation mutually, thus improve the resistance to pressure (ginseng patent documentation 2 in detail: hereinafter referred to as " conventional example 2 ") of coil entirety.In the technology of this conventional example 2, as shown in figure 12, magnetic core 80, lower end flange portion 83a and upper end flange portion 83b is defined by extending laterally along its diametric(al) from winding core 81, in addition, middle flange portion also by arranging more than 1, makes to form indivedual winding portion respectively between each flange part, thus makes the resistance to pressure for coil entirety require to be dispersed in each indivedual winding portion.

In addition, in the technology of existing example 2, the respective outer rim of lower end flange portion 83a, upper end flange portion 83b and middle flange portion is also formed with more shallow notch part, simultaneously, from lower end flange portion 83a to upper end flange portion 83b, comprise lower end flange portion 83a and upper end flange portion 83b, be also formed with the continuous notch part in the axle center deeply reaching winding core.Further, the winding starting end of winding or winding terminating end, by through this continuous notch part, the insulation resistance between the entirety of can guarantee to reel starting end or winding terminating end and indivedual winding portion.

Prior art document:

Patent documentation

Patent documentation 1: Japanese Patent Application Publication JP 2001-8443 publication

Patent documentation 2: Japanese Patent Application Publication JP 2010-161260 publication

Utility model content

Technical problem to be solved:

In the technology of above-mentioned conventional example 2, magnetic core is formed with the continuous notch part till the axis deeply reaching winding core.The degree of depth of this continuous notch part is very dark.In addition, in order to ensure be wound on winding core winding portion and through the winding starting end of continuous notch part or the dielectric voltage withstand that reels terminating end, be necessary the fabric width of continuous notch part is narrowed.Such fabric width is very narrow, and the continuous notch part that the degree of depth is very dark, and for general employing, granular magnetic material is bonded together, the magnetic core formed by more crisp material, it is easy to machine-shaping hardly.

And in order to improve the inductance of the coil using magnetic core to manufacture, generally can adopt following formation scheme, what the axis namely formed along the winding core of magnetic core extended runs through pore, and core unshakable in one's determination for the can-like with central protrusion portion is inserted this runs through pore.

But, if have employed the magnetic core with the magnetic core shape that conventional example 2 technology uses, because the winding starting end of winding or winding terminating end pass along the axis of winding core, so can not adopt the formation scheme that core unshakable in one's determination for the can-like with central protrusion portion is inserted in the axis along the winding core of magnetic core.

The utility model, make in view of the above circumstances just, to provide following magnetic core as object, namely this magnetic core is while employing has the formation of middle flange portion, can also be easy to form magnetic core, and be suitable for manufacturing the magnetic element that can tolerate higher applied voltage.In addition, the utility model also to provide following magnetic element as object, while namely this magnetic element is easy to manufacture, also has higher resistance to pressure.

Solution:

First form of the present utility model is a kind of magnetic core, and it is the magnetic core be made up of magnetic material, has the winding core of column; Base flange portion, this base flange portion is formed to extend laterally along the diametric(al) of above-mentioned winding core from the installation end face of above-mentioned winding core; And middle flange portion, this middle flange portion is formed to extend laterally along the diametric(al) in the cross section parallel with above-mentioned base flange portion; It is characterized by, above-mentioned winding core has the 1st winding core and the 2nd winding core, and the 1st winding core is between above-mentioned middle flange portion and above-mentioned base flange portion; 2nd winding core, relative to above-mentioned middle flange portion, is positioned at on the position of above-mentioned 1st opposition side, winding core side; The diameter of above-mentioned 1st winding core is longer than the diameter of above-mentioned 2nd winding core.

Relate to magnetic core of the present utility model, can also at least be provided with continuous notch part, this continuous notch part crosses over above-mentioned base flange portion, above-mentioned 1st winding core and above-mentioned middle flange portion, parallel with the direction, axis of above-mentioned winding core.In this case, space length between the wire portion of the conductive wire of this continuous notch part and winding portion can be maintained across, and then keep insulating properties between the two, and, can also position wire portion.

Here, preferred above-mentioned continuous notch part has the degree of depth till the radial position deeply reaching above-mentioned 2nd winding core outer peripheral face.Further, preferably in above-mentioned base flange portion, be also provided with the 1st other notch part, the 1st other notch part is than the depth as shallow of above-mentioned continuous notch part; And on above-mentioned middle flange portion, also be provided with the 2nd other notch part, 2nd other gap portions is in relative with above-mentioned 1st notch part, and be parallel on the position in direction, axis of above-mentioned winding core, and there is the degree of depth till the diametric(al) position of the periphery deeply reaching above-mentioned 2nd winding core.In addition, what the axis be preferably also provided with on above-mentioned winding core along above-mentioned winding core extended runs through pore.

By this magnetic core, the 1st wire portion be connected with the winding starting end of winding can be made to guide through continuous notch from installing end face side, and reel towards the 1st winding core from rolling up away from the 2nd winding core installing end face.Then, be wound onto the winding portion of the 2nd winding core, by the winding pars intermedia through the 2nd other notch part on middle flange portion, be electrically connected with the adjacent winding portion being wound on the 1st winding core.

In addition, being formed, the winding portion being wound on above-mentioned 1st winding core is (following, also be referred to as " final winding portion ") after, for the 2nd wire portion be connected with the winding terminating end of winding, while maintain the insulation patience between the winding portion beyond itself and final winding portion, make it pass the 1st other notch part simultaneously, and the 2nd wire portion is directed to installation end face side.Therefore, by magnetic core of the present utility model, because do not need to form very narrow and very dark continuous notch part, just can easily make it shaping, and, require to become very low to the resistance to pressure of each winding portion, can improve using the overall resistance to pressure of this magnetic core as the magnetic element of inscape.

Above-mentioned 1st and the 2nd winding core of magnetic core of the present utility model is also formed along these winding core axis extend run through pore.Therefore, by forming winding portion as mentioned above between each flange part, meanwhile, running through pore by magnetic part is inserted this, the magnetic element with higher inductance can be manufactured.

2nd form of the present utility model is a kind of magnetic element, and it is the magnetic element with magnetic core and winding, it is characterized by, and above-mentioned magnetic core has the winding core of column; Base flange portion, this base flange portion is formed to extend laterally along the diametric(al) of above-mentioned winding core from the installation end face of above-mentioned winding core; And middle flange portion, this middle flange portion is formed to extend laterally along the diametric(al) in the cross section parallel with above-mentioned base flange portion; Above-mentioned winding core has the 1st winding core and the 2nd winding core, and the 1st winding core is between above-mentioned middle flange portion and above-mentioned base flange portion; 2nd winding core is positioned at on the position of above-mentioned 1st opposition side, winding core side relative to above-mentioned middle flange portion; The diameter of above-mentioned 1st winding core is longer than the diameter of above-mentioned 2nd winding core, and above-mentioned winding is wound onto on above-mentioned winding core.

Here, be preferably at least also formed with continuous notch part, this continuous notch part crosses over above-mentioned base flange portion, above-mentioned 1st winding core and above-mentioned middle flange portion, and parallel with the direction, axis of above-mentioned winding core.In addition, preferred above-mentioned continuous print notch part has the degree of depth till the diametric(al) position of the outer peripheral face deeply reaching above-mentioned 2nd winding core.Further, preferably in above-mentioned base flange portion, be also provided with the 1st other notch part, the 1st other notch part is than the depth as shallow of above-mentioned continuous notch part; And on above-mentioned middle flange portion, also be provided with the 2nd other notch part, 2nd other gap portions is in relative with above-mentioned 1st notch part, and be parallel on the position in direction, axis of above-mentioned winding core, and there is the degree of depth till the diametric(al) position of the periphery deeply reaching above-mentioned 2nd winding core.

This magnetic element is the magnetic element being wound with winding on the winding core of above-mentioned magnetic core of the present utility model.That is, when reeling winding, the 1st wire portion that is connected with the winding starting end of winding can be made to pass continuous notch and be directed to from installing end face side and reel towards the 1st winding core away from the 2nd winding core ability of installing end face.Then, be wound onto the winding portion of the 2nd winding core, by the winding pars intermedia through the 2nd other notch part on middle flange portion, be electrically connected with the adjacent winding portion being wound on the 1st winding core.In addition, being formed, the winding portion being wound on above-mentioned 1st winding core is (following, also be referred to as " final winding portion ") after, for the 2nd wire portion be connected with the winding terminating end of winding, while maintain the insulation patience between the winding portion beyond itself and final winding portion, make it pass the 1st other notch part simultaneously, and the 2nd wire portion is directed to installation end face side.Thus, the magnetic element involved by the utility model, while being easy to manufacture, also has higher resistance to pressure.

In addition; also preferred above-mentioned winding portion comprises the 1st winding portion and the 2nd winding portion; 1st winding portion is wound onto on above-mentioned 1st winding core; 2nd winding portion is wound onto on above-mentioned 2nd winding core; meanwhile, be connected with above-mentioned 1st winding portion by the winding pars intermedia through above-mentioned 2nd notch part; Above-mentioned 1st winding portion comprises the winding terminating end of above-mentioned winding portion, and above-mentioned 2nd winding portion comprises the winding starting end of above-mentioned winding portion; Above-mentioned winding starting end is connected with the 1st metal terminal by the 1st wire portion through above-mentioned continuous notch part, and above-mentioned winding terminating end is connected with the 2nd metal terminal by the 2nd wire portion through above-mentioned 1st other notch part, between above-mentioned 1st wire portion and above-mentioned 1st winding portion, also have insulating element.

Here, the preferred insulating tape of above-mentioned insulating element.The adhesive tape that insulating tape can use following material to form, such as polyester film, polyimide film, PTEE film, acetate film, polyester film, and the adhesive tape employing rubbery bonding agent, polyester film thin plate, the adhesive tape that glass fibre etc. are made.

In addition, by making liner component be isolated between above-mentioned 2nd wire portion and above-mentioned 1st winding portion, even if the voltage difference between wire portion and winding portion is larger, also fully insulating properties can be guaranteed.As above-mentioned liner component, polypropylene can be used, polyethylene, polyvinyl chloride, polystyrene, polyvinyl acetate base, ABS resin, AS resin, the formed parts such as allyl resin.

In addition; also preferred above-mentioned winding portion comprises the 1st winding portion and the 2nd winding portion; 1st winding portion is wound onto on above-mentioned 1st winding core; 2nd winding portion is wound onto on above-mentioned 2nd winding core; meanwhile, be connected with above-mentioned 1st winding portion by the winding pars intermedia through above-mentioned 2nd notch part; Above-mentioned 1st winding portion comprises the winding terminating end of above-mentioned winding portion, and above-mentioned 2nd winding portion comprises the winding starting end of above-mentioned winding portion; Above-mentioned winding starting end is connected with the 1st metal terminal by the 1st wire portion through above-mentioned continuous notch part, and above-mentioned winding terminating end is connected with the 2nd metal terminal by the 2nd wire portion through above-mentioned 1st other notch part, between above-mentioned 1st wire portion and above-mentioned 1st winding portion, also have insulating space.

By magnetic element of the present utility model, can arrange continuous notch part on the 1st winding core, this continuous notch part, in order to accommodate wire portion, makes the peripheral part of the 2nd winding core identical with the height of bottom surface.And the insulating element of the outer peripheral face along the 1st winding core is formed as the form wrapping the 1st wire portion.Thus, after wire portion is banded in metal terminal portion, to make it through this continuous notch part, and when being wound on the 2nd winding core, can guarantee, through the 1st wire portion of the conductive wire of above-mentioned notch part and the 1st winding portion, there is sufficient resistance to pressure.Thus, even if such as between the 1st wire portion and the 1st winding portion voltage difference very high, also fully can guarantee the insulating properties between them.

Here, what the axis that also can make above-mentioned winding core is also provided with along above-mentioned winding core extended runs through pore.Meanwhile, above-mentionedly pore can be run through core unshakable in one's determination for the can-like with central protrusion portion is inserted into.In this case, magnetic element can be made to obtain higher inductance value, can also suppress from the outside leakage magnetic flux of magnetic element meanwhile.Therefore, the electromagnetic interference to other electronic components loaded on the same substrate can be prevented.

Beneficial effect:

As described above, can reach following effect by relating to magnetic core of the present utility model, namely can realize a kind of magnetic element, this magnetic element has the simple formation of middle flange portion, and is easy to manufacture, and meanwhile, also has higher resistance to pressure.In addition, by relating to magnetic element of the present utility model, one can be provided to be easy to manufacture, meanwhile, also to there is the magnetic element of higher resistance to pressure.

In addition, according to the utility model, following effect can also be reached, namely the metal terminal of the wire portion of conductive wire from the installed surface being arranged on magnetic element, make it through above-mentioned continuous notch part, and when the 2nd winding core of magnetic core starts to reel, there is no difference in height, so also the possibility of conductor cord disconnection just can be reduced owing to being formed between the bottom surface of above-mentioned continuous notch part and the outer peripheral face of the 2nd winding core.

Accompanying drawing explanation

Fig. 1 relates to the stereogram of the magnetic core of the utility model embodiment.

Fig. 2 is the front elevation of the continuous notch part of the magnetic core representing Fig. 1.

Fig. 3 is that the back of the body of indivedual notch parts of the magnetic core representing Fig. 1 looks portion.

Fig. 4 is the top view of the magnetic core of Fig. 1.

Fig. 5 is the sectional view in the A-A' cross section of the magnetic core of Fig. 1.

Fig. 6 is the stereogram of the magnetic element embodiment of the present utility model representing the can-like iron core with central protrusion portion.

Fig. 7 is the stereogram of the winding iron core representing Fig. 6.

Fig. 8 is the front elevation of the winding iron core representing Fig. 7.

Fig. 9 is the dorsal view of the winding iron core representing Fig. 7.

Figure 10 is the sectional view in the B-B' cross section of the winding iron core representing Fig. 7.

Figure 11 is the pie graph representing general LED drive circuit.

Figure 12 is in order to the figure that existing magnetic core forms is described.

Description of reference numerals:

10 ... magnetic core

11 ... base flange portion

11a, 11b, 14a, 14b ... indivedual notch part

12A ... 1st winding core

12B ... 2nd winding core

13 ... top flange portion

14 ... middle flange portion

15 ... continuous notch part

18 ... abutment portion

22A ... 1st winding portion

22B ... 2nd winding portion

23A ... 1st wire portion

23B ... 2nd wire portion

25 ... can-like is unshakable in one's determination

27 ... insulating element

Embodiment

Below, with reference to the accompanying drawings, the embodiment relating to magnetic core of the present utility model and magnetic element is described.In addition, describe at following and in accompanying drawing, give same symbol to same or equal key element, and the repetitive description thereof will be omitted.

1. execution mode 1: the embodiment of magnetic core

The magnetic core 10 relating to the present embodiment is described with reference to Fig. 1 ~ Fig. 3.Here, Fig. 1 is the oblique view representing magnetic core 10.In addition, Fig. 2 is the front elevation of magnetic core 10, and Fig. 3 represents the dorsal view of magnetic core 10.

Magnetic core 10 is made up of magnetic material.Fig. 1 ~ Fig. 3 comprehensively illustrates this magnetic core 10, it has the base flange portion 11 be formed in abutment portion 18, and the 1st winding core 12A, the 1st winding core 12A is the opposition side being positioned at abutment portion 18, in the column extended along the direction of axis 30 from base flange portion 11.In addition, magnetic core 10 has middle flange portion 14, this middle flange portion 14 is formed on the end of the opposition side, base flange portion 11 with the 1st winding core 12A, 2nd winding core 12B, 2nd winding core 12B is in the opposition side of the 1st winding core 12A, the column extended along direction, axis 30 from middle flange portion 14, and top flange portion 13, this top flange portion 13 is that the end of the opposition side of middle flange portion 14 at the 2nd winding core 12B is formed.

Here, winding core 12 is formed by the 1st winding core 12A, the 2nd winding core 12B.Further, the diameter of the 1st winding core 12A is larger than the diameter of the 2nd winding core 12B, all shorter than the diameter of any one in base flange portion 11, top flange portion 13 and middle flange portion 14.In addition, the axial length L A of the 1st winding core 12A, longer than the axial length L B of the 2nd winding core 12B.

Further, the diameter of abutment portion 18 is all longer than the diameter of any one in base flange portion 11, top flange portion 13 and middle flange portion 14.

Further, be also provided with continuous notch part 15, it to middle flange portion 14, and has the degree of depth (Fig. 2) of the diametric(al) position of the periphery deeply reaching the 1st winding core 12A from base flange portion 11 and abutment portion 18.In this continuous notch part 15, the deepest part of breach is parallel with axis 30 substantially, and have and the outer peripheral face of the 2nd winding core 12B conplane degree of depth substantially, along this part make the wire portion of conductive wire through time, will guarantee to form the space length with abundant insulating properties between the winding portion (the 1st winding portion 22A in aftermentioned Fig. 7) that the 1st winding core 12A is formed for this wire portion and being wound on.

In addition, in base flange portion 11 and in abutment portion 18, centered by the position of axis 30, in the place relative with the forming position of continuous notch part 15, be also provided with indivedual notch part 11b (Fig. 3) of the depth as shallow than continuous notch part 15 further.In addition, abutment portion 18 bottom surface is also provided with the 1st metal terminal portion 19A inserting printed circuit board through-hole and the 2nd metal terminal portion 19B.

In addition, as the material of the magnetic core 10 of the present embodiment, except the ferrite of Mn-Zn system or Ni-Zn system etc. that can use the insulation rate with regulation, the soft magnetic metals such as Fe-Al-Si and amorphousmetal can also be used, or the mixture etc. of two or more these material.But there is regulation insulation rate as precondition using magnetic core.

About the manufacture method of magnetic core 10, conventional has cutting method, metal powder injection molding method (Metal Injection Molding), compression method or filling method etc.Further, magnetic core 10 can also be divided into several part, after being shaped separately separately, then be combined into a magnetic core by adhesive etc.

2. execution mode 2: the embodiment of magnetic element

Secondly, main reference Fig. 6 ~ Figure 10 is described the magnetic element 20 relating to the present embodiment.Here, Fig. 6 is the stereogram of the magnetic element 20 being covered with can-like iron core.In addition, Fig. 7 is the stereogram of the magnetic core (hereinafter also referred to as " winding iron core 21 ") being wound with winding of inscape as magnetic element 20, and Fig. 8 is the front elevation of winding iron core 21, and Fig. 9 is the dorsal view of winding iron core 21.Figure 10 is the sectional view of the winding iron core 21 of Fig. 7 when blocking along B-B' cross section.

As shown in Figure 6, magnetic element 20 also has winding iron core 21.Magnetic element 20 also has can-like iron core 25 in addition.

Above-mentioned winding unshakable in one's determination 21, as comprehensively represented in Fig. 7 ~ 9, has and above-mentioned magnetic core 10 and the winding 22 that is wound on this magnetic core 10 by conductive wire and formed.In addition, winding iron core 21 has the 1st wire portion 23A and the 2nd wire portion 23B.

Above-mentioned winding 22 has the 1st winding portion 22A be wound on the 1st winding core 12A, and is wound on the 2nd winding portion 22B on the 2nd winding core 12B.In addition, winding 22 also has through indivedual notch part 14b, connects the winding pars intermedia 22M of the 1st winding portion 22A and the 2nd winding portion 22B.

In the present embodiment, the number of turn of the 1st winding portion 22A is roughly the same with the number of turn of the 2nd winding portion 22B.In addition, the 1st winding portion 22A and the 2nd winding portion 22B, equally in cylindric.Therefore, the external diameter of the 1st winding portion 22A is identical with the external diameter of the 2nd winding portion 22B substantially.

In addition, in the present embodiment, the 2nd winding portion 22B is wound into following form, the form that namely the imaginary periphery of its periphery and indivedual notch part is general tangential.As a result, the periphery of the 1st winding portion 22A has just kept apart with the diametric most deep of indivedual notch part 11b and 14b.

Above-mentioned 1st wire portion 23A, through continuous notch part 15, is connected with the winding starting end of the 1st metal terminal 19A and the 2nd winding portion 22B.In addition, the 2nd above-mentioned wire portion 23B, through indivedual notch part 11b, is connected with the winding terminating end of the 2nd metal terminal 19B and the 1st winding portion 22A.In addition, between indivedual notch part 11a and indivedual notch part 14a, the 1st wire portion 23A is linearly.Further, as shown in Figure 10, insulating element 27 around outer week Monday of the 1st winding core 12A, and is interposed between the 1st wire portion 23A and the 1st winding portion 22A.In addition, this insulating element is generally the insulating tape of sheet, and containing polyester film, polyimide film, PTEE film, acetate film, polyester film, with the adhesive tape employing rubbery bonding agent, polyester film thin plate, one or more materials such as glass fibre.

In addition, as mentioned above, because the most deep of the inner circumferential of the 1st winding portion 22A and continuous notch part 15 is isolated, so the 1st wire portion 23A linearly between indivedual notch part 11a and 14a, and be state of insulation between the 1st winding portion 22A.In this embodiment, preferably large at the diameter of depth ratio the 1st wire portion 23A of the continuous notch part 15 of the 1st winding core 12A.Namely, by this every the insulating element 27 be situated between, and the 1st space length between wire 23A and insulating element 27, the insulation patience for applied voltage between winding portion 22 two ends can be guaranteed, and inductance desirably determines the diametric length LA of the 1st winding core 12A, the diametric length LB of the 2nd winding core 12B, and the number of turn of the number of turn of the 1st winding portion 22A and the 2nd winding portion 22B.

When making relevant winding iron core 21, first, conductive wire end, after namely the 1st wire portion 23A ties on the 1st metal terminal 19A, making it through continuous notch part 15, and guiding to the 2nd winding core 12B.Afterwards, by the periphery of insulating element 27 along the 1st winding core 12A, post with the form wrapping the 1st wire portion 23A.Further, according to the number of turn predetermined, conductive wire is wound up into the 2nd winding core 12B, and forms columned 2nd winding portion 22B.

Then, make conductive wire pass indivedual notch part 14b, and guide to the 1st winding core 12A.Afterwards, according to the number of turn predetermined, conductive wire is wound to the 1st winding core 12A, and forms columned 1st winding portion 22A.

Secondly, make the 2nd wire portion 23B of another end of conductive wire through after indivedual notch part 11b, tie around on the 2nd metal terminal 19B.As a result, winding iron core 21 has just been made.

Above-mentioned can-like iron core 25, its material, except the ferrite of Mn-Zn system or Ni-Zn system etc. that can use the insulation rate with regulation, can also use the soft magnetic metals such as Fe-Al-Si and amorphousmetal, or the mixture etc. of two or more these material.But there is regulation insulation rate as precondition using can-like iron core.This can-like iron core 25 is bottoms is cylinder with the end.

The external diameter of can-like iron core 25 is identical substantially with the external diameter of the abutment portion 18 of above-mentioned bobbin 10, and meanwhile, axial length is longer than the length to the upper surface in top flange portion 13 from abutment portion 18 end face in bobbin 10.Therefore, the base flange portion 11 of magnetic core 10, winding core 12, middle flange portion 14 and top flange portion 13 can be received in can-like 25 inner spaces unshakable in one's determination.

When manufacture has the magnetic element 20 of above-mentioned inscape, first, as mentioned above, conductive wire is wound in magnetic core 10 and makes winding iron core 21.Then, after the top (side, top flange portion 13) of winding iron core 21 covers can-like iron core 25, adhesive is used to fix.As a result, just magnetic element 20 has as shown in Figure 6 above been got well in manufacture.

Just as described above, magnetic core 10 is in the present embodiment the magnetic core be made up of magnetic material, has the 1st winding core 12A and the 2nd winding core 12B of column; Base flange portion 11, this bottom flange portion 11 is from the installation end face of the 1st winding core 12A, and the diametric(al) along the above-mentioned winding core of the 1st winding core 12A extends laterally; And middle flange portion 14, this middle flange portion 14 extends laterally along the diametric(al) in the cross section parallel with base flange portion 11 and is formed.

Further, be also provided with continuous notch part 15, this continuous notch part 15 to middle flange portion, has the degree of depth till the position, outer circumference diameter direction deeply reaching the 1st winding core 12A from abutment portion 18 and base flange portion 11.Meanwhile, be also provided with indivedual notch part 11b, this indivedual notch part 11b is arranged on the position different from the setting position of continuous notch part 15, and has the degree of depth of the depth as shallow than continuous notch part 15.In addition, on middle flange portion 14, relative to indivedual notch part 11b, and on the position parallel with the direction, axis of the 1st winding core 12A, be also provided with indivedual notch part 14b.

In addition, the magnetic core 10 of an embodiment on also having in the magnetic element 20 of this embodiment, and the 1st winding portion 22A and the 2nd winding portion 22B, the 1st winding portion 22A and the 2nd winding portion 22B are wound on conductive wire successively on the 1st winding core 12A of this magnetic core 10 and the 2nd winding core 12B and are formed.When manufacturing this magnetic element, first the 1st wire portion 23A of conductive wire end being tied around after the 1st metal terminal 19A, making it pass continuous notch part 15, and be directed into the 2nd winding core 12B.Afterwards, according to the prespecified number of turn, conductive wire is wound into the 2nd winding core 12B, forms cylindrical 2nd winding portion 22B.Then make conductive wire pass indivedual notch part 14b, direct it to the 1st winding core 12A.Afterwards, according to the prespecified number of turn, conductive wire is wound into the 1st winding core 12A, forms cylindrical 1st winding portion 22A.Again, make the 2nd wire portion 23B of another end of conductive wire through indivedual notch part 11b, tie around to the 2nd metal terminal 19B.

Therefore, following magnetic core can be realized by the present embodiment, while namely which employs the formation of middle flange portion, also be easy to shaping, and be suitable for manufacturing the magnetic element that can tolerate high applied voltage.In addition, can also realize being easy to manufacturing, there is the magnetic element of higher resistance to pressure simultaneously.

In this example, be the degree of depth to the diametric(al) position of the periphery of the 2nd winding core 12B continuous notch part 15 depth-set.Therefore, in order to form the 1st winding portion 22A or the 2nd winding portion 22B, and time the 1st wire portion 23A of conductive wire is passed continuous notch part 15, the distortion of the 1st wire portion 23A will be minimum.

In addition, in the present embodiment, the diameter of the 1st winding core 12A is longer than the diameter of the 1st winding core 12B, and meanwhile, the length LA of the 1st winding core 12A is longer than the length LB of the 2nd winding core 12B.Therefore by being formed at isolation between the 1st winding portion 22A of the 1st winding core 12A and the 2nd wire portion 23B to maintain dielectric voltage withstand, make the applied voltage applied to the 1st winding portion 22A same with the applied voltage applied to the 2nd winding portion 22B simultaneously.

Further, also there is can-like iron core 25 further in the present embodiment.Therefore, can suppress from magnetic element 20 outwards leakage magnetic flux, and the electromagnetic interference to other electronic components loaded on the same substrate can be prevented.

In addition, in the present embodiment, by maintaining insulating element between the 1st winding portion 22A and the 1st wire portion 23A and space length, just achieve insulation patience.In contrast, owing to there is no need to make to keep insulation patience between the 1st winding portion 22A and the 2nd wire portion 23B, also just there is no need to make insulating element every between wherein.

3. execution mode 3: the variation of magnetic element

As variation, the liner component be made up of can also be set between above-mentioned magnetic core 10 and above-mentioned canned iron core insulating material.By arranging the liner component be made up of insulating material, more can positively make to insulate between above-mentioned winding portion 22 and above-mentioned can-like iron core 25.Can use such as insulating element, polypropylene, polypropylene, polyethylene, polyvinyl chloride, polystyrene, polyvinyl acetate base, ABS resin, AS resin, the materials such as allyl resin.

Moreover the utility model is not limited to the above-mentioned 1st and the 2nd embodiment, when not damaging purport of the present utility model, can also carry out all distortion.Such as, in the above-described embodiments, disclose the situation that the diameter of depth ratio the 1st wire portion 23A of the continuous notch part 15 of the 1st winding core 12A is large, but, in fact, when the insulating properties of insulating element 27 is fully high, the degree of depth of continuous notch part 15 can be less than the diameter of the 1st wire portion 23A.Further, when not hindering winding winding, continuous notch part 15 also can not be set.In the case, the 1st wire portion 23A can be imported from notch part 11a, make it pass the outer peripheral face of the 1st winding core 12A, be wound on the 2nd winding core 12B via notch part 14a.Further, how all insulating element 27, i.e. insulating tape, can also reel.In addition, disclosed herein that middle flange portion is 1 piece, but also can be many pieces.

Claims (10)

1. a magnetic core, it is the magnetic core be made up of magnetic material,

There is the winding core of column;

Base flange portion, this base flange portion is formed to extend laterally along the diametric(al) of above-mentioned winding core from the installation end face of above-mentioned winding core;

And middle flange portion, this middle flange portion is formed to extend laterally along the diametric(al) in the cross section parallel with above-mentioned base flange portion;

It is characterized by, above-mentioned winding core has the 1st winding core and the 2nd winding core,

1st winding core is between above-mentioned middle flange portion and above-mentioned base flange portion;

2nd winding core, relative to above-mentioned middle flange portion, is positioned at on the position of above-mentioned 1st opposition side, winding core side;

The diameter of above-mentioned 1st winding core is longer than the diameter of above-mentioned 2nd winding core.

2. magnetic core according to claim 1, is characterized by and be at least also provided with continuous notch part, and this continuous notch part crosses over above-mentioned base flange portion, above-mentioned 1st winding core and above-mentioned middle flange portion, and parallel with the direction, axis of above-mentioned winding core.

3. magnetic core according to claim 2, is characterized by above-mentioned continuous print notch part and has the degree of depth till the diametric(al) position of the outer peripheral face deeply reaching above-mentioned 2nd winding core.

4. magnetic core according to claim 3, is characterized by, and above-mentioned base flange portion is also provided with the 1st other notch part, and the 1st other notch part is than the depth as shallow of above-mentioned continuous notch part; And on above-mentioned middle flange portion, being also provided with the 2nd other notch part, the 2nd other gap portions in relative with above-mentioned 1st other notch part, and is parallel on the position in direction, axis of above-mentioned winding core.

5. a magnetic element, it is the magnetic element with magnetic core and the winding be made up of magnetic material,

It is characterized by,

The magnetic core that above-mentioned magnetic core is made up of magnetic material,

There is the winding core of column; Base flange portion, this base flange portion is formed to extend laterally along the diametric(al) of above-mentioned winding core from the installation end face of above-mentioned winding core; And middle flange portion, this middle flange portion is formed to extend laterally along the diametric(al) in the cross section parallel with above-mentioned base flange portion;

Above-mentioned winding core has the 1st winding core and the 2nd winding core, and the 1st winding core is between above-mentioned middle flange portion and above-mentioned base flange portion; 2nd winding core is positioned at on the position of above-mentioned 1st opposition side, winding core side relative to above-mentioned middle flange portion;

The diameter of above-mentioned 1st winding core is longer than the diameter of above-mentioned 2nd winding core, and above-mentioned winding is wound onto on above-mentioned winding core.

6. magnetic element according to claim 5, it is characterized by, at least also be formed with continuous notch part, this continuous notch part crosses over above-mentioned base flange portion, above-mentioned 1st winding core and above-mentioned middle flange portion, and parallel with the direction, axis of above-mentioned winding core.

7. magnetic element according to claim 6, is characterized by, and above-mentioned continuous print notch part has the degree of depth till the diametric(al) position of the outer peripheral face deeply reaching above-mentioned 2nd winding core.

8. magnetic element according to claim 7, is characterized by, and above-mentioned base flange portion is also provided with the 1st other notch part, and the 1st other notch part is than the depth as shallow of above-mentioned continuous notch part; And on above-mentioned middle flange portion, being also provided with the 2nd other notch part, the 2nd other gap portions in relative with above-mentioned 1st other notch part, and is parallel on the position in direction, axis of above-mentioned winding core.

9. magnetic element according to claim 8, it is characterized by, above-mentioned winding portion comprises the 1st winding portion and the 2nd winding portion, 1st winding portion is wound onto on above-mentioned 1st winding core, 2nd winding portion is wound onto on above-mentioned 2nd winding core, meanwhile, be connected with above-mentioned 1st winding portion by the winding pars intermedia through above-mentioned 2nd other notch part; Above-mentioned 1st winding portion comprises the winding terminating end of above-mentioned winding portion, and above-mentioned 2nd winding portion comprises the winding starting end of above-mentioned winding portion; Above-mentioned winding starting end is connected with the 1st metal terminal by the 1st wire portion through above-mentioned continuous notch part, and above-mentioned winding terminating end is connected with the 2nd metal terminal by the 2nd wire portion through above-mentioned 1st other notch part, between above-mentioned 1st wire portion and above-mentioned 1st winding portion, also have insulating element.

10. magnetic element according to claim 9, is characterized by, and also has can-like iron core further.