JP3186898U - Magnetic core and magnetic element using the magnetic core - Google Patents

Abstract

Provided are a magnetic core and a magnetic element that can realize a magnetic element having a high pressure resistance while being easy to manufacture with a simple configuration.
As a configuration of a magnetic core, a columnar core part, and a base collar part 11 formed so as to extend outward from a mounting end surface of the core part along a radial direction of the core part. And an intermediate flange 14 formed so as to extend outward along the radial direction of the cross section parallel to the basal ridge, and the core portion is between the intermediate ridge and the basal ridge 12A of 1st core parts located, and 2nd core part 12B located in the opposite side to the 1st core part side to an intermediate collar part, The diameter of the 1st core part is the above-mentioned It is longer than the diameter of the second core part. By adopting this magnetic core, a magnetic element including a plurality of winding blocks that divide the voltage applied to the whole is manufactured.
[Selection] Figure 1

Description

  The present invention relates to a reel member having a simple structure suitable for manufacturing a magnetic element that can withstand a high applied voltage, and a magnetic element using the reel member.

  In recent years, lighting fixtures that employ LEDs (light emitting die auto) as light emitters have become widespread as lighting fixtures that replace conventional incandescent lamps and fluorescent lamps. An LED driving circuit is mounted on a lighting fixture employing such an LED.

  An example of such an LED drive circuit is disclosed in Japanese Patent Application Laid-Open No. 2001-8443 (Patent Document 1: hereinafter referred to as “Conventional Example 1”). As shown in FIG. 11, the LED driving circuit of Conventional Example 1 is connected to LED element 102, coil 103 connected in series to LED element 102, and LED element 102 and coil 103 in parallel. The diode element 104 is provided.

  The LED driving circuit is disposed between the DC power source 101 that applies a pulse voltage, the LED element 102, and the DC power source 101, and switches between applying / non-applying the output voltage of the DC power source 101 to the LED element 102. The switching element 105 is further provided.

  In the LED driving circuit of Conventional Example 1 configured as described above, when the switching element 105 is on, the output voltage of the DC power supply 101 is applied to the LED element 102 to cause the LED element 102 to emit light. . On the other hand, when the switching element 105 is off, the LED element 102 is caused to emit light using the counter electromotive force of the coil 103.

  By the way, in the LED drive circuit, since the LED element 102 is regarded as a capacitive element, most of the power supplied from the DC power supply 101 is consumed by the coil 103, and most of the power supply voltage is applied to the coil 103. Become. As a result, especially in overseas countries where the household power supply is 200 V or higher, the coil 103 has a voltage of 500 to 600 V in order to prevent a short circuit between the conductive wire on the winding end side and the conductive wire on the winding start side. The above pressure resistance is required.

  In order to satisfy the required pressure resistance, a technique has been proposed in which the winding part is divided into a plurality of parts separated from each other to increase the pressure resistance of the entire coil (refer to Patent Document 2 below). Called). In the technique of the conventional example 2, as shown in FIG. 12, the lower end collar part 83a and the upper end collar part formed by extending the magnetic core 80 outward along the radial direction from the core part 81. In addition to 83b, by providing one or more intermediate flanges, winding portions are formed between the flange portions, and the pressure resistance required for the entire coil is distributed for each winding portion. .

  Further, in the technique of the second conventional example, shallow notches are formed on the outer edges of the lower end flange 83a, the upper end flange 83b, and the intermediate flange, and the lower end flange 83a extends from the lower end flange 83a to the upper end flange 83b. And the continuous notch part which reaches an axis | shaft is formed in a core part including the upper end collar part 83b. Then, by passing the winding start end or winding end of the winding portion through the continuous cutout portion, it is possible to ensure a dielectric strength voltage between the winding start end or winding end and all of the winding portions.

Japanese Patent Laid-Open No. 2001-8443 JP 2010-161260 A

  In the technique of Conventional Example 2 described above, a continuous notch having a depth reaching the axis is formed in the magnetic core in the magnetic core. The depth of this continuous notch is very deep. Moreover, in order to ensure the withstand voltage of the winding part wound around the winding core part and the winding start end or winding end passing through the continuous notch part, it is necessary to narrow the width of the continuous notch part. It is difficult to say that such a continuous notch having a narrow width and a deep depth can be easily formed on a magnetic core made of a relatively brittle material to which a granular magnetic material is generally bonded.

  By the way, in order to increase the inductance of a coil manufactured using a magnetic core, generally, a through hole extending along the axis of the core portion of the magnetic core is formed, and the core portion of the navel pot core is formed in the through hole. The structure to insert is employ | adopted. However, when the magnetic core in the shape of the magnetic core employed in the technique of the conventional example 2 is employed, the winding start end or winding end of the winding is passed along the axis of the winding core. It cannot be set as the structure which inserts the core part of a navel pot core along the axis line of this core part.

  The present invention has been made in view of the above circumstances, and employs a configuration including an intermediate collar, and is suitable for manufacturing a magnetic element that can easily form a magnetic core and can withstand a high applied voltage. An object is to provide a reel member. It is another object of the present invention to provide a magnetic element having high pressure resistance while being easy to manufacture.

  A first aspect of the present invention is a magnetic core made of an insulating material, which has a columnar core portion; and extends outward from the mounting end surface of the core portion along the radial direction of the core portion. A basal ridge formed to extend; and an intermediate ridge formed to extend outward along a radial direction of a cross section parallel to the basal ridge, and the core portion includes: A first core part located between the intermediate collar part and the base collar part; a second core part located on the side opposite to the first core part side with respect to the intermediate collar part; The magnetic core is characterized in that the diameter of the first core part is longer than the diameter of the second core part.

  In the magnetic core according to the present invention, a continuous notch portion may be provided so as to be parallel to the axial direction of the core portion over at least the base collar portion, the first core portion, and the intermediate collar portion. Good. In this case, the lead portion can be positioned while maintaining a spatial distance for insulation between the lead portion of the conductive wire passing through the continuous notch and the winding portion.

Here, it is preferable that the continuous notch has a depth to the radial position of the outer peripheral surface of the second core portion. Further, the base collar portion is provided with a first individual notch portion having a depth smaller than that of the continuous notch portion, and the intermediate collar portion is provided with the core portion with respect to the first notch portion. It is preferable that a second individual notch portion having a depth up to a radial position on the outer periphery of the second core portion is provided at a position parallel to the axial direction.
Moreover, it is preferable that the said core part is provided with the through-hole extended along the axis line of the said core part.

  According to this magnetic core, the first lead portion connected to the winding start end of the winding is pulled up from the mounting end surface side through the continuous cutout portion, and starts to be wound from the second core portion far from the mounting end surface. It can be wound around a core part. And the coil | winding part wound by the 2nd core part is the winding intermediate part which passes along the 2nd separate notch part in the intermediate | middle collar part between the coil | winding parts wound by the adjacent 1st core part. Are connected electrically.

After the formation of the winding portion wound around the first winding core portion (hereinafter also referred to as “final winding portion”), the second lead connected to the winding end of the winding is connected to the final winding. While maintaining the insulation resistance with the windings other than the wire part, the lead is led to the mounting end face side through the first individual notch part.
Therefore, according to the reel member of the present invention, it is not necessary to form a narrow and deep continuous cut-out portion, so that it can be easily formed, and the pressure resistance requirement for each winding portion is reduced, and the reel member is configured. The pressure resistance of the entire magnetic element as an element can be improved.

  The first and second core portions of the magnetic core of the present invention are formed with through holes extending along the axes of the core portions. For this reason, a magnetic element having a high inductance can be manufactured by forming a winding portion between the flange portions as described above and inserting a magnetic member into the through hole.

  A second aspect of the present invention is a magnetic element including a magnetic core and a winding, wherein the magnetic core includes a columnar core portion; and from the mounting end surface of the core portion, the core portion. A basal ridge formed so as to extend outward along a radial direction of the base; an intermediate ridge formed by extending outward along a radial direction of a cross section parallel to the basal ridge A first core part located between the intermediate collar part and the base collar part; and the first core part side with respect to the intermediate collar part A second core portion located on the opposite side, wherein the diameter of the first core portion is longer than the diameter of the second core portion, and the winding is wound around the core portion. It is a magnetic element characterized by the above.

  Here, it is preferable that a continuous notch is provided so as to be parallel to the axial direction of the core part over at least the base collar part, the first core part, and the intermediate collar part. Moreover, it is preferable that the said continuous notch part has the depth to the radial direction position of the outer peripheral surface of the said 2nd core part. Further, the base collar portion is provided with a first individual notch portion having a depth smaller than that of the continuous notch portion, and the intermediate collar portion is provided with the core portion with respect to the first notch portion. It is preferable that a second individual notch portion having a depth up to a radial position on the outer periphery of the second core portion is provided at a position parallel to the axial direction.

This magnetic element is a magnetic element in which a winding is wound around the core part of the magnetic core of the present invention described above. That is, when winding the winding, the first lead portion connected to the winding start end of the winding is guided from the mounting end surface side to the second core portion through the continuous notch, and then the second winding far from the mounting end surface. You can start winding from the core and then wind it around the first core. And the coil | winding part wound by the 2nd core part is the winding intermediate part which passes along the 2nd separate notch part in the intermediate | middle collar part between the coil | winding parts wound by the adjacent 1st core part. Are connected electrically.
After the formation of the winding portion wound around the first winding core portion (hereinafter also referred to as “final winding portion”), the second lead connected to the winding end of the winding is connected to the final winding. It is guided to the mounting end face side through the first individual cutout portion while maintaining the insulation resistance with the winding portion other than the wire portion.
As a result, the magnetic element of the present invention can be easily manufactured but can have high pressure resistance.

The winding portion includes a first winding portion wound around the first winding core portion; a winding intermediate portion wound around the second winding core portion and passing through the second notch portion. A second winding portion connected to the first winding portion via the first winding portion, the first winding portion including a winding end of the winding portion; and the second winding portion, A winding start end of the winding portion is included; the winding start end is connected to the first metal terminal via a first lead portion passing through the continuous cutout portion; and the winding end is a second through the first individual cutout portion. It is preferable that an insulating member is interposed between the first lead portion and the first winding portion, which is connected to the second metal terminal 2 via a lead.
Here, the insulating member is preferably an insulating tape. As the insulating tape, for example, a polyester film, a polyimide film, a PTEE film, an acetate cloth, a polyester film, a paper using a rubber-based adhesive, a polyester film mat, a tape made of a glass cloth or the like can be used.
By interposing a spacer member between the winding portion and the pot core provided on the outside, sufficient insulation can be ensured even when the voltage difference between the two is large. As the spacer member, for example, a member made of polypropylene, polyethylene, polyvinyl chloride, polystyrene, polyvinyl acetate, ABS resin, AS resin, acrylic resin, or the like can be used.

  The winding portion also includes a first winding portion wound around the first winding core portion; a winding intermediate portion wound around the second winding core portion and passing through the second notch portion. A second winding part connected to the first winding part via the first winding part, the first winding part including a winding end of the winding part; and the second winding part includes the winding part. A winding start end of the wire portion; the winding start end being connected to the first metal terminal via a first lead portion passing through the continuous cutout portion; and the winding end being a second lead passing through the first individual cutout portion. It is preferable that the insulating member is interposed between the first lead portion and the first winding portion.

  According to the magnetic element of the present invention, the first core portion is provided with the continuous notch portion so that the outer peripheral portion and the bottom surface of the second core portion are at the same height in order to accommodate the first lead portion. An insulating member is formed along the outer peripheral surface of the first core portion so as to wrap the first lead portion. For this reason, the first lead portion and the first winding portion of the conductive wire passing through the notch portion when the lead portion is wound around the metal terminal portion and then wound around the second core portion through the continuous notch portion. In addition, sufficient pressure resistance can be ensured. Thereby, even if the voltage difference between the first lead portion and the first winding portion is high, sufficient insulation can be ensured.

  Here, the core part may be formed with a through hole extending along the axis of the core part, and the core part of the navel pot core may be inserted into the through hole. In this case, the magnetic element can have a high inductance, and acts to suppress leakage of the magnetic flux outside the magnetic element. For this reason, it can contribute to preventing the electromagnetic interference to the other electronic components mounted on the same board | substrate.

  As described above, according to the magnetic core according to the present invention, it is possible to realize a magnetic element having a high pressure resistance while being easy to manufacture while having a simple configuration without an intermediate collar portion. Play. In addition, according to the magnetic element of the present invention, it is possible to provide a magnetic element having high pressure resistance while being easy to manufacture.

  According to the present invention, when the lead portion of the conductive wire starts winding from the second core portion of the magnetic core through the continuous notch portion described above from the metal terminal attached to the mounting surface of the magnetic element, the continuous notch portion Since the continuous notch portion is formed so that there is no step between the bottom surface of the first core portion and the outer peripheral surface of the second core portion, there is an effect that the possibility that the conducting wire is disconnected can be reduced.

1 is a perspective view of a magnetic core according to an embodiment of the present invention. It is a front view which shows the continuous notch part of the magnetic core of FIG. It is a back surface which shows the individual notch part of the magnetic core of FIG. It is a top view of the magnetic core of FIG. It is sectional drawing which shows the A-A 'cross section of the magnetic core of FIG. It is a perspective view of the embodiment of the magnetic element of the present invention with a pot core. It is a perspective view of the winding core of FIG. It is a front view of the winding core of FIG. It is a rear view of the winding core of FIG. It is sectional drawing which shows the B-B 'cross section of the winding core of FIG. It is a figure which shows the structure of a general LED drive circuit. It is a figure for demonstrating the structure of the conventional magnetic core.

  Embodiments of a magnetic core and a magnetic element according to the present invention will be described below with reference to the accompanying drawings. In the following description and drawings, the same or equivalent elements are denoted by the same reference numerals, and redundant description is omitted.

<Embodiment of magnetic core>
A magnetic core 10 according to an embodiment will be described with reference to FIGS. Here, FIG. 1 shows a perspective view of the magnetic core 10. 2 is a front view of the magnetic core 10, and FIG. 3 is a rear view of the magnetic core 10.

  The magnetic core 10 is made of an insulating material. As shown in FIGS. 1 to 3, the magnetic core 10 has a base collar portion 11 formed on the base portion 18 and an axial (30) direction on the side opposite to the base portion 18 side. And a columnar first core portion 12 </ b> A extending from the base collar portion 11. In addition, the magnetic core 10 has an intermediate collar 14 formed at the end opposite to the base collar 11 side of the first core 12A, and an axis (on the opposite side to the first core 12A) ( 30) A columnar second winding core portion 12B extending from the intermediate collar portion 14 along the direction, and a top collar portion 13 formed at the end of the second winding core portion 12B opposite to the intermediate collar portion 14 side. It has.

  Here, the core part 12 is composed of the first core part 12A and the second core part 12B. And the diameter of 12 A of 1st core parts is larger than the diameter of 2nd core part 12B, and is shorter than any of the diameter of the base collar part 11, the top collar part 13, and the intermediate collar part 14. FIG. Further, the axial length LA of the first winding core portion 12A is longer than the axial length LB of the second winding core portion 12B.

Furthermore, the diameter of the base part 18 is longer than any of the diameters of the base collar part 11, the top collar part 13, and the intermediate collar part 14.

  And the continuous notch part 15 of the depth to the radial direction position of the outer periphery of the 1st core part 12A is provided ranging from the base collar part 11 and the base part 18 to the intermediate collar part (FIG. 2). The deepest notch in the continuous notch 15 has a depth that is substantially parallel to the axis 30 and forms substantially the same plane as the outer peripheral surface of the second core portion 12B. When the lead portion is passed, sufficient insulation is provided between the lead portion and a winding portion (first winding portion 22A in FIG. 7 described later) formed by being wound around the first core portion 12A. It is possible to secure a spatial distance that can realize the sex.

  In addition, the base ridge part 11 and the base part 18 are provided with individual cutout parts 11b having a depth shallower than that of the continuous cutout part 15 at positions facing the formation position of the continuous cutout part 15 around the position of the axis 30. (FIG. 3). On the bottom surface of the base portion 18, a first metal terminal portion 19A and a second metal terminal portion 19B for being inserted into a through hole of a printed wiring board are disposed.

  In addition, as a material of the magnetic core 10 of this embodiment, soft magnetic metals, such as Fe-Al-Si, amorphous metals, or these materials other than Mn-Zn type or Ni-Zn type ferrite having a predetermined insulation ratio, or these materials A mixture of two or more of them can be used. However, the magnetic core is required to have a predetermined insulation rate or higher.

  In addition, a conventional cutting method, a metal powder injection method (Metal Injection Molding), a compression method, a filling method, or the like is used for the method of manufacturing the magnetic core 10. Further, after dividing the magnetic core 10 into several members and individually molding each member, one magnetic core may be combined with an adhesive or the like.

<Embodiment of Magnetic Element>
Next, the magnetic element 20 according to the embodiment will be described with reference mainly to FIGS. Here, FIG. 6 is a perspective view of the magnetic element 20 covered with a pot core. 7 is a perspective view of a wound magnetic core (hereinafter also referred to as “winding core 21”), which is a component of the magnetic element 20, and FIG. 8 is a front view of the winding core 21. FIG. 9 is a rear view of the winding core 21. FIG. 10 is a cross-sectional view of the winding core 21 of FIG. 7 taken along the line BB ′.

  As shown in FIG. 6, the magnetic element 20 includes a winding core 21. The magnetic element 20 includes a pot core 25.

  As shown in FIGS. 7 to 9, the winding core 21 includes the magnetic core 10 described above and a winding 22 formed by winding a conductive wire around the magnetic core 10. Yes. The winding core 21 includes a first lead portion 23A and a second lead portion 23B.

  The winding 22 includes a first winding portion 22A wound around the first winding core portion 12A and a second winding portion 22B wound around the second winding core portion 12B. Further, the winding 22 includes a winding intermediate portion 22M that passes through the individual cutout portion 14b and connects the first winding portion 22A and the second winding portion 22B.

  In this embodiment, the number of turns of the first winding part 22A and the number of turns of the second winding part 22B are substantially the same. Further, both the first winding portion 22A and the second winding portion 22B are cylindrical. For this reason, the outer diameter of the first winding portion 22A is substantially the same as the outer diameter of the second winding portion 22B.

  In this embodiment, the winding of the second winding portion 22B is rotated until the outer periphery comes into substantially contact with the virtual outer periphery of the individual notch portion. As a result, the outer periphery of the first winding portion 22A is separated from the radially deepest portion of the individual notches 11b and 14b.

  The first lead portion 23A passes through the continuous cutout portion 15 and connects the first metal terminal 19A and the winding start end of the second winding portion 22B. The second lead portion 23B passes through the individual cutout portion 11b and connects the second metal terminal 19B and the winding end of the first winding portion 22A. Note that the first lead portion 23A is linear between the individual cutout portion 11a and the individual cutout portion 14a. Furthermore, as shown in FIG. 10, the insulating member 27 goes around the outer circumference of the first core portion 12A and is interposed between the first lead portion 23A and the first winding portion 22A. This insulating member is usually a sheet-like insulating tape, and one or more of polyester film, polyimide film, PTEE film, acetate cloth, polyester film, paper using a rubber adhesive, polyester film mat, glass cloth, etc. Contains seed material.

  As described above, since the inner circumference of the first winding portion 22A and the radially deepest portion of the continuous notch 15 are interposed by the insulating member 27, a straight line is formed between the individual notches 11a and 14a. The first lead portion 23A and the first winding portion 22A are in an insulated state. In this embodiment, it is preferable that the depth of the continuous notch portion 15 in the first core portion 12A is larger than the diameter of the first lead portion 23A. That is, according to a desired inductance, the insulation resistance against the voltage applied between both ends of the winding portion 22 can be ensured by the intervening insulating member 27 and the spatial distance between the first lead 23A and the insulating member 27. Thus, the radial length LA of the first winding core portion 12A, the radial length LB of the second winding core portion 12B, the number of turns of the first winding portion 22A, and the number of turns of the second winding portion 22B are as follows. It has come to be determined.

  In producing the winding core 21, first, the first lead portion 23A at one end of the conductive wire is entangled with the first metal terminal 19A and then passed through the continuous notch 15 to the second winding core portion 12B. Lead. Thereafter, the insulating member 27 is attached along the outer periphery of the first core portion 12A so as to wrap the first lead portion 23A. Further, the conductive wire is wound around the second winding core portion 12B by a predetermined number of turns to form a cylindrical second winding portion 22B first.

  Subsequently, the conductive wire is guided to the first core portion 12A through the individual cutout portion 14b. Thereafter, the conductive wire is wound around the first core portion 12A by a predetermined number of turns to form a cylindrical first winding portion 22A.

  Next, the second lead 23B portion at the other end of the conductive wire is passed through the individual notch portion 11b and then entangled with the second metal terminal 19B. As a result, the winding core 21 is created.

  The pot core 25 is made of a soft magnetic metal such as Fe-Al-Si, an amorphous metal, or two or more kinds of materials other than Mn-Zn-based or Ni-Zn-based ferrite having a predetermined insulation rate. A mixture of the above can be used. However, the magnetic core is required to have a predetermined insulation rate or higher. The pot core 25 has a cylindrical shape with one bottom portion having a bottom.

  The pot core 25 has an outer diameter that substantially matches the outer diameter of the base portion 18 of the magnetic core 10 described above, and the length in the axial direction extends from the upper surface of the base portion 18 in the magnetic core 10 to the upper surface of the top collar 13. It is longer than the length. For this reason, the base collar part 11, the core part 12, the intermediate collar part 13, and the top collar part 14 in the magnetic core 10 can be accommodated in the internal space of the pot core 25.

  When manufacturing the magnetic element 20 having such components, first, as described above, a conductive wire is wound around the magnetic core 10 to form the winding core 21. Subsequently, after covering the pot core 25 from above the winding core 21 (on the side of the top collar 13), it is fixed using an adhesive. As a result, the magnetic element 20 shown in FIG. 6 is manufactured.

  As described above, the magnetic core 10 in the embodiment is a magnetic core made of an insulating material, and includes the columnar first core portion 12A and the second core portion 12B; and the mounting end surface of the first core portion 12A. From the first winding core portion 12A, the base ridge portion 11 formed to extend outward along the radial direction of the core portion; and along the radial direction of the cross section parallel to the basal flange portion 11 And an intermediate flange 14 formed by extending in the direction.

  Then, a continuous notch 15 having a depth from the base 18 and the base collar 11 to the radial position of the outer periphery of the first core part 12A is provided from the base collar 11 to the intermediate collar, and the continuous notch 15 is provided. Individual notch portions 11b having a depth shallower than the depth of the continuous notch portion 15 are provided at positions different from the positions where they are formed. Further, the intermediate collar portion 14 is provided with individual cutout portions 14b at positions parallel to the individual cutout portions 11b in the axial direction of the first core portion 12A.

  In addition, the magnetic element 20 in the present embodiment is formed by winding a conductive wire in accordance with the magnetic core 10 in the present embodiment and the first core portion 12A and the second core portion 12B of the magnetic core 10. The magnetic element includes a first winding portion 22A and a second winding portion 22B. In manufacturing the magnetic element, the first lead portion 23A at one end of the conductive wire is entangled with the first metal terminal 19A and then led to the second core portion 12B through the continuous cutout portion 15. Thereafter, the conductive wire is wound around the second core portion 12B by a predetermined number of turns to form a cylindrical second winding portion 22B. Subsequently, the conductive wire is guided to the first core portion 12A through the individual cutout portion 14b. Thereafter, the conductive wire is wound around the first core portion 12A by a predetermined number of turns to form a cylindrical first winding portion 22A. Next, the second lead portion 23B at the other end of the conductive wire is entangled with the second metal terminal 19B after passing through the individual cutout portion 11b.

  Therefore, according to this embodiment, it is possible to realize a reel member suitable for manufacturing a magnetic element that can be easily formed and can withstand a high applied voltage, while adopting a configuration including an intermediate flange. In addition, a magnetic element having high pressure resistance can be realized while being easily manufactured.

  In this embodiment, the depth of the continuous notch 15 is the depth to the radial position of the outer periphery of the first core portion 12A. For this reason, when the conductive wire is passed through the continuous notch portion 15 to form the second winding portion 22B or the first winding portion 22A, the deformation of the first lead portion 23A is minimized. Can be made.

  In the present embodiment, the diameter of the first core part 12A is formed larger than the diameter of the second core part 12B, and the length LA of the first core part 12A is set to the length of the second core part 12B. It was longer than LB. For this reason, while maintaining the withstand voltage by the separation between the first winding portion 22A formed on the first winding core portion 12A and the second lead portion 23B, the applied voltage to the second winding portion 22B, It is possible to easily equalize the voltage applied to the first winding portion 22A.

  In this embodiment, the pot core 25 is further provided. For this reason, it can suppress that magnetic flux leaks out of the magnetic element 20, and can contribute to preventing the electromagnetic interference to the other electronic components mounted on the same board | substrate.

In this embodiment, the insulation resistance is realized by maintaining the insulating member and the spatial distance between the first winding portion 22A and the first lead portion 23A.
On the other hand, since it is not necessary to take insulation resistance between the first winding portion 22A and the second lead portion 23B, it is not necessary to interpose an insulating member.

<Modification of magnetic element>
As a modification, a spacer member made of an insulating material may be provided between the magnetic core 10 and the pot core 25. By providing a spacer member made of an insulating material, the winding portion 22 and the pot core 25 can be further reliably insulated. Examples of the insulating member include materials such as polypropylene, polypropylene, polyethylene, polyvinyl chloride, polystyrene, polyvinyl acetate, ABS resin, AS resin, and acrylic resin.

In addition, this invention is not limited to said 1st and 2nd embodiment, A various deformation | transformation can be performed unless the main point of this invention is impaired. For example, in the above-described embodiment, it has been disclosed that the depth of the continuous notch 15 in the first core portion 12A is larger than the diameter of the first lead portion 23A. If it is sufficiently high, the depth of the continuous notch 15 may be smaller than the diameter of the first lead portion 23A. Furthermore, if there is no problem with the winding, the continuous notch 15 need not be provided. In this case, the first lead portion 23A may be introduced from the notch portion 11a, passed through the outer peripheral surface of the first core portion 12A, and wound around the second core portion 12B via the notch portion 14a. Is possible. Furthermore, the insulating member 27, that is, the insulating tape may be wound around a plurality of turns.
In addition, although it disclosed that the middle collar part was one sheet, a multiple sheet | seat is also possible.

DESCRIPTION OF SYMBOLS 10 ... Magnetic core 11 ... Base collar part 11a, 11b, 14a, 14b ... Individual notch part 12A ... 1st winding core part 12B ... 2nd winding core part 13 ... Top collar part 14 ... Intermediate collar part 15 ... Continuous notch part 18 ... base part 22A ... first winding part 22B ... second winding part 23A ... first lead part 23B ... second lead part 25 ... pot core 27 ... insulating member

Claims (10)

A magnetic core made of a magnetic material,
A columnar core part;
A base ridge formed so as to extend outward from the mounting end surface of the core portion along the radial direction of the core portion;
An intermediate hook formed to extend outward along a radial direction of a cross section parallel to the base hook;
The core part is
A first core portion located between the intermediate collar and the base collar;
A second core portion located on the opposite side of the intermediate core portion from the first core portion side;
The diameter of the first core part is longer than the diameter of the second core part,
The magnetic core according to claim 1, wherein the magnetic core is a magnetic core.   The continuous notch portion is provided so as to be parallel to the axial direction of the core portion over at least the base collar portion, the first core portion, and the intermediate collar portion. Magnetic core.   3. The magnetic core according to claim 2, wherein the continuous notch has a depth to a radial position of an outer peripheral surface of the second core part. 4. The base collar portion is provided with a first individual notch portion that is shallower than the continuous notch portion, and the intermediate collar portion has an axial direction of the core portion with respect to the first notch portion. A second individual notch having a depth up to a radial position on the outer periphery of the second core portion is provided at a position parallel to
The magnetic core according to claim 3. A magnetic element comprising a magnetic core made of a magnetic material and a winding,
The magnetic core is
A columnar core part;
A base ridge formed so as to extend outward from the mounting end surface of the core portion along the radial direction of the core portion;
An intermediate hook formed by extending outward along a radial direction of a cross section parallel to the base hook; and
The core part is
A first core portion located between the intermediate collar and the base collar;
A second core portion located on the opposite side of the intermediate core portion from the first core portion side;
The diameter of the first core part is longer than the diameter of the second core part,
The winding is wound around the core part,
A magnetic element characterized by the above.   The continuous notch portion is provided so as to be parallel to the axial direction of the core portion over at least the base collar portion, the first core portion, and the intermediate collar portion. Magnetic element.   The magnetic element according to claim 6, wherein the continuous notch has a depth to a radial position of an outer peripheral surface of the second core portion. The base collar portion is provided with a first individual notch portion that is shallower than the continuous notch portion, and the intermediate collar portion has an axial direction of the core portion with respect to the first notch portion. A second individual notch having a depth up to a radial position on the outer periphery of the second core portion is provided at a position parallel to
The magnetic core according to claim 7. The winding portion is
A first winding wound around the first winding core;
A second winding part wound around the second winding core part and connected to the first winding part via a winding middle part passing through the second notch part;
The first winding part includes a winding end of the winding part;
The second winding part includes a winding start end of the winding part;
The winding start end is connected to a first metal terminal via a first lead portion that passes through the continuous notch,
The winding end is connected to the second metal terminal 2 via a second lead passing through the first individual notch,
An insulating member is interposed between the first lead portion and the first winding portion.
The magnetic element according to claim 8.   The magnetic element according to claim 9, further comprising a pot core.

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