JP3186765U - Winding frame member and magnetic element using this winding frame member - Google Patents

Abstract

A reel member capable of realizing a magnetic element having high pressure resistance is provided.
A columnar first core portion 12A, a second core portion 12B, and a base rod formed so as to extend outward in the radial direction from the mounting end surface of the first core portion 12A. A portion 11 and an intermediate collar 14 formed to extend outward along the radial direction of the cross section parallel to the base collar 11 are provided. In addition, the base collar portion 11 is provided with the first cutout portion 11a in the first core portion 12A and the second cutout portion 11b having a depth shallower than the depth of the first cutout portion 11a. Further, the intermediate collar portion 14 is provided with a third notch portion 14a at a position parallel to the axial direction of the first core portion with respect to the first notch portion 11a, and the first notch with respect to the second notch portion 11b. A fourth cutout portion 14b having a depth shallower than the depth of the third cutout portion 14a is provided at a position parallel to the axial direction of the core portion.
[Selection] Figure 3

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. 13, 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 such a required pressure resistance, a technique has been proposed in which the winding is divided into a plurality of blocks 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. 14, 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, individual winding portions are formed between the flange portions, and the pressure resistance required for the entire coil is distributed for each individual winding portion. ing.

  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 through the continuous notch, it is possible to ensure a dielectric strength between the winding start end or winding end and all of the individual 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 insulation withstand voltage between the individual 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 reduce 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.

  The narrow and deep continuous notch portion employed in the technique of Conventional Example 2 can be easily formed by selecting a material as long as it is an insulating material such as plastic. In this case, the reel member is not a magnetic core but a bobbin.

  By the way, in order to increase the inductance of a coil manufactured using a bobbin as a winding frame member, generally, a through hole extending along the axis of the bobbin core is formed, and the core of the navel pot core is inserted into the through hole. A configuration is adopted. However, when the bobbin having 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 a core part.

  The present invention has been made in view of the above circumstances, adopts a configuration including an intermediate flange, can be easily formed regardless of whether it is a magnetic core or a bobbin, and has a high applied voltage. An object of the present invention is to provide a reel member suitable for the manufacture of a magnetic element that can withstand. It is another object of the present invention to provide a magnetic element having high pressure resistance while being easy to manufacture.

  A reel member according to the present invention includes: a columnar core portion; and a base collar portion formed so as to extend outward from a mounting end surface of the core portion along a 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 intermediate hook is between both end faces of the core portion. A first notch portion having a first depth equal to or less than a depth to the radial position of the outer periphery of the core portion is provided in the base collar portion, and the first notch portion The second notch portion having a second depth shallower than the first depth is provided at a position different from the position where the first core portion is provided, and the intermediate flange portion has the winding core with respect to the first notch portion. A third notch portion having a third depth not more than the depth to the radial position of the outer periphery of the core portion is provided at a position parallel to the axial direction of the core portion, A reel having a fourth notch portion having a fourth depth shallower than the third depth is provided at a position parallel to the axial direction of the core portion with respect to the second notch portion. It is a member.

  The winding member is wound around the winding core portion as follows. First, after passing the first lead portion connected to the winding start end of the winding through the first notch portion from the side opposite to the core portion side, from the base heel side to the individual winding portion between the heel portions Are sequentially formed. Here, the individual windings other than the individual winding part (hereinafter also referred to as “final individual winding part”) that is the farthest from the base collar part, which is the individual winding part that is formed last, 4 The outer diameter does not reach the notch. Adjacent individual winding portions are electrically connected to each other via a winding intermediate portion passing through the third notch portion in the intermediate flange portion between the adjacent individual winding portions. Then, after the final individual winding portion is formed, the second lead connected to the winding end of the winding is maintained in the insulation resistance with respect to the individual winding portions other than the final individual winding portion. Through the fourth cutout part of the part and the second cutout part of the base collar part, the lead part is guided to the side opposite to the core part side.

  Therefore, according to the reel member of the present invention, it is not necessary to form a narrow and deep continuous cutout portion, so that it can be easily formed, and the pressure resistance requirement for each individual winding portion is reduced. The pressure resistance of the entire magnetic element as a constituent element can be increased.

  In the reel member of the present invention, the first depth and the third depth may be the depth to the radial position of the outer periphery of the core portion.

  In the reel member of the present invention, the core portion is a first core portion located between the intermediate collar portion and the base collar portion; the first core portion side with respect to the intermediate collar portion A second core portion located on the opposite side of the first core portion, and the diameter of the first core portion may be the same as the diameter of the second core portion. Thus, when the diameter of the first core part and the diameter of the second core part are made the same, the length of the first core part is made longer than the length of the second core part. May be. In this case, while maintaining the withstand voltage by the separation between the first individual winding portion (first winding portion) formed in the first winding core portion and the second lead portion described above, the first It is easy to make the applied voltage to the individual winding part equal to the applied voltage to the second individual winding part (second winding part) formed on the second winding core part. it can.

  The reel member of the present invention can be a magnetic core made of a magnetic material or a bobbin made of an insulating material.

  In the reel member of the present invention, when the bobbin is made of an insulating material, a through hole extending along the axis of the core part may be formed in the core part.

  The magnetic element of the present invention is a magnetic element including a winding frame member and a winding, and the winding frame member includes a columnar core portion; and the winding core portion from the mounting end surface of 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 The intermediate flange is formed at a predetermined location between both end faces of the core portion, and the base flange has a depth to the radial position of the outer periphery of the core portion. A first notch having the following first depth is provided, and a second notch having a second depth shallower than the first depth is provided at a position different from the position where the first notch is provided. A radial position of the outer periphery of the core portion so that the intermediate collar portion is parallel to the axial direction of the core portion with respect to the first notch portion; A third notch having a depth equal to or less than the depth of the third notch, and a depth shallower than the third depth at a position parallel to the axial direction of the core portion with respect to the second notch. The fourth cutout portion is provided, and the winding is wound around the core portion.

  This magnetic element is a magnetic element in which a winding is wound around the core portion of the above-described reel member of the present invention. That is, when winding the winding, after the first lead portion connected to the winding start end of the winding is passed through the first cutout portion from the side opposite to the core portion side, Individual winding portions are sequentially formed between the portions. Here, the individual windings other than the final individual winding portion described above have an outer diameter that does not reach the second and fourth cutout portions. Adjacent individual winding portions are electrically connected to each other via a winding intermediate portion passing through the third notch portion in the intermediate flange portion between the adjacent individual winding portions. In addition, after the formation of the final individual winding portion described above, the second lead connected to the winding end of the winding maintains the insulation resistance with the individual winding portions other than the final individual winding portion, It is made to guide to the opposite side to the core part side through the 4th notch part of a part, and the 2nd notch part of a base collar part.

  Therefore, according to the magnetic element of the present invention, it is possible to have high pressure resistance while being easy to manufacture.

  In the magnetic element of the present invention, the first depth may be a depth up to a radial position on the outer periphery of the core portion.

  Moreover, in the magnetic element of the present invention, the core part is a first core part located between the intermediate collar part and the base collar part; and the first core part with respect to the intermediate collar part A second core portion located on the opposite side of the side, and the diameter of the first core portion and the diameter of the second core portion may be the same. Thus, when the diameter of the first core part and the diameter of the second core part are made the same, the length of the first core part is made longer than the length of the second core part. May be. In this case, while maintaining the withstand voltage by the separation between the first individual winding portion (first winding portion) formed in the first winding core portion and the second lead portion described above, the first It is easy to make the applied voltage to the individual winding part equal to the applied voltage to the second individual winding part (second winding part) formed on the second winding core part. it can.

  In the magnetic element of the present invention, when the first core portion and the second core portion described above are provided, the winding is a first winding portion wound around the first core portion; A second winding part wound around a second winding core part and connected to the first winding part via a winding middle part passing through the third notch part, and The winding portion includes a winding start end of the winding; the second winding portion includes a winding end of the winding; and the winding start end passes through the first lead portion passing through the first notch portion. Connected to the first metal terminal, the winding end is connected to the second metal terminal 2 via a second lead passing through the second notch part and the third notch part, the second lead part, A spacer member made of an insulating member may be interposed between one winding portion. In this case, even if the distance between the second lead portion and the first winding portion is short, a spacer member made of an insulating member is interposed, so that there is a gap between the second lead portion and the first winding portion. Insulation resistance can be ensured.

  Here, the spacer member may be an insulating tape. In this case, the insulation resistance between the second lead portion and the first winding portion can be easily ensured. As the insulating tape, for example, a tape made of polyester film, polyimide film, PTEE film, acetate cloth, polyester film, paper using rubber adhesive, polyester film mat, glass cloth or the like may be used. it can.

  In the magnetic element of the present invention, when the first core portion and the second core portion described above are provided, the winding is a first winding portion wound around the first core portion; A second winding part wound around a second winding core part and connected to the first winding part via a winding middle part passing through the third notch part, and The winding portion includes a winding start end of the winding; the second winding portion includes a winding end of the winding; and the winding start end via a first lead portion passing through the first notch portion. Connected to a first metal terminal, and the winding end is connected to a second metal terminal via a second lead passing through the second notch and the fourth notch, and the second lead and the first Only a space can be interposed between the winding portions. In this case, by appropriately maintaining the spatial distance between the second lead portion and the first winding portion, the second lead portion and the first winding portion can be used without using a spacer member for insulation. Insulation resistance between the two can be ensured.

  In the magnetic element of the present invention, the reel member may be a magnetic core made of a magnetic material. In this case, it is possible to obtain a magnetic element with high inductance only by winding the winding around the winding frame member.

  Here, a pot core may be further provided. In this case, the pot core acts together with the magnetic core so as 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.

  In the magnetic element of the present invention, the reel member may be a bobbin made of an insulating material. 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.

It is a perspective view of the magnetic core which is 1st Embodiment of the reel member of this invention. FIG. 2 is a front view, a left side view, and a right side view of the magnetic core of FIG. 1. It is a rear view, a top view, and a bottom view of the magnetic core of FIG. 1 is a perspective view of a first embodiment of a magnetic element of the present invention. It is a perspective view of the winding core of FIG. FIG. 6 is a front view, a right side view, and a rear view of the winding core of FIG. 5. It is the front view, top view, and bottom view of the pot core of FIG. It is a perspective view of the bobbin which is 2nd Embodiment of the reel member of this invention. FIG. 9 is a front view, a left side view, and a right side view of the bobbin in FIG. 8. It is a perspective view of 2nd Embodiment of the magnetic element of this invention. It is a perspective view of the winding bobbin of FIG. It is the front view, top view, and bottom view of the navel pot 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.

[First Embodiment]
First, a magnetic core that is a reel member according to the first embodiment of the present invention and a magnetic element according to the first embodiment manufactured using the magnetic core will be described.

<Magnetic core>
The magnetic core 10 according to the first embodiment will be described with reference to FIGS. Here, FIG. 1 shows a perspective view of the magnetic core 10. FIG. 2 shows a front view, a left side view, and a right side view of the magnetic core 10. FIG. 3 shows a rear view, a top view, and a bottom view of the magnetic core 10.

  The magnetic core 10 is made of a magnetic 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 and the diameter of the 2nd core part 12B are the same, and are 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.

  The base collar portion 11 and the base portion 18 are provided with a first notch portion 11a having a depth up to the radial position of the outer periphery of the first core portion 12A. Further, the base ridge part 11 and the base part 18 have a second notch part having a depth shallower than that of the first notch part 11a at a position facing the formation position of the first notch part 11a with the axis 30 as a center. 11b is provided.

  The intermediate flange 14 has a depth up to a radial position on the outer circumference of the first core portion 12A and the second core portion 12B at a position parallel to the axial direction of the core portion 12 with respect to the first notch portion 11a. A third cutout portion 14a is provided. Further, the intermediate collar portion 14 is provided with a fourth notch portion 14b having a depth smaller than that of the third notch portion 14a at a position parallel to the axial direction of the core portion 12 with respect to the second notch portion 11b. Yes.

  The top collar 13 includes a fifth notch 13a having a depth up to a radial position on the outer periphery of the second core 12B at a position parallel to the axial direction of the core 12 with respect to the first notch 11a. Is provided. The top collar 13 is provided with a sixth notch 13b having a depth smaller than that of the fifth notch 13a at a position parallel to the axial direction of the core 12 with respect to the second notch 11b. Yes.

  Further, 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 the printed wiring board are arranged.

  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.

  It is also possible to take an insulating measure such as application of an insulating material such as resin on the outer peripheral surface of the magnetic core.

  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.

<Magnetic element>
Next, the magnetic element 20 according to the first embodiment will be described with reference mainly to FIGS. Here, FIG. 4 is a perspective view of the magnetic element 20. 5 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. 6 is a front view of the winding core 21, right side view. It is a figure and a rear view. FIG. 7 is a top view, a front view, and a bottom view of a pot core 25 that is a component of the magnetic element 20.

  As shown in FIG. 4, the magnetic element 20 includes a winding core 21. The magnetic element 20 includes a pot core 25.

  5 and 6, 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. As shown in FIG. ing. 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. The winding 22 includes a winding intermediate portion 22M that passes through the third cutout portion 14a and connects the first winding portion 22A and the second winding portion 22B.

  In the first 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 shorter than the outer diameter of the second winding portion 22B.

  In the first embodiment, the winding of the second winding portion 22B is rotated until the outer circumference comes into contact with the fourth cutout portion 14b. As a result, the outer periphery of the first winding part 22A is separated from the radially deepest part of the second notch part 11b and the fourth notch part 14b.

  The first lead portion 23A passes through the first cutout portion 11a and connects the first metal terminal 19A and the winding start end of the first winding portion 12A. The first lead portion 23A passes through the second cutout portion 11b and the fourth cutout portion 14b, and connects the second metal terminal 19B and the winding end of the first winding portion 12A. In addition, between the 2nd notch part 11b and the 4th notch part 14b, the 2nd lead part 23B is made into linear form.

  As described above, since the outer circumference of the first winding portion 22A is separated from the radially deepest portions of the second cutout portion 11b and the fourth cutout portion 14b, the second cutout portion 11b and the fourth cutout portion are separated. A space is interposed between the second lead portion 23B that is linear with the portion 14b and the first winding portion 22A. In the first embodiment, the length of the first core portion 12A in the radial direction according to the desired inductance so that the insulation resistance against the voltage applied between both ends of the winding 22 can be ensured by the intervening space. LA, the length LB in the radial direction of the second winding core portion 12B, and the number of turns of the first winding portion 22A and the number of turns of the second winding portion 22B are 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 the first core portion 12A is passed through the first cutout portion 11a. Lead to. 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.

  Subsequently, the conductive wire is guided to the second core portion 12B through the third notch portion 14a. 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.

  Next, the second lead 23B portion at the other end portion of the conductive wire is passed through the fourth cutout portion 14b and the second cutout portion 11b in sequence, 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. As shown in FIG. 7, 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 14, and the top collar part 13 of 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. 4 is manufactured.

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

  And the base collar part 11 is provided with the 1st notch part 11a of the depth to the radial direction position of the outer periphery of the 1st core part 12A, and is different from the position where the 1st notch part 11a is provided. A second notch 11b having a depth shallower than the depth of the first notch 11a is provided at the position. In addition, the intermediate collar portion 14 has a depth up to a radial position on the outer periphery of the first core portion 12A at a position parallel to the axial direction of the first core portion 12A with respect to the first notch portion 11a. The third notch portion 14a is provided, and the fourth notch portion 14b having a depth shallower than the depth of the third notch portion 14a is provided at a position parallel to the axial direction of the first core portion 12A with respect to the second notch portion 11b. Is provided.

  In addition, the magnetic element 20 in the first embodiment is formed by winding a conductive wire around the magnetic core 10 in the first embodiment and the first core portion 12A and the second core portion 12B of the magnetic core 10. This magnetic element includes the first winding portion 22A and the 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 first core portion 12A through the first notch portion 11a. 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. Subsequently, the conductive wire is guided to the second core portion 12B through the third notch portion 14a. 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. Next, the second lead portion 23B at the other end of the conductive wire is passed through the fourth cutout portion 14b and the second cutout portion 11b in sequence, and then entangled with the second metal terminal 19B.

  Therefore, according to the first 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 the first embodiment, the diameter of the first core portion 12A and the diameter of the first core portion 12B are the same, and the length LA of the first core portion 12A is set to the second core portion. The length was longer than the length LB of 12B. 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 first winding portion 22A, It is possible to easily equalize the voltage applied to the second winding portion 22B.

  In the first 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.

  An insulating spacer member may be further provided between the first winding portion 22A and the second lead portion 23B. As this spacer member, an insulating tape made of polyester film, polyimide film, PTEE film, acetate cloth, polyester film, paper using a rubber adhesive, polyester film mat, glass cloth or the like can be employed.

[Second Embodiment]
First, a bobbin that is a reel member according to a second embodiment of the present invention and a magnetic element according to the second embodiment manufactured using the bobbin will be described.

<Bobbin>
A bobbin 50 according to a second embodiment will be described with reference mainly to FIGS. Here, a perspective view of the bobbin 50 is shown in FIG. FIG. 9 shows a front view, a left side view, and a right side view of the bobbin 50.

  8 and 9, in the bobbin 50, elements corresponding to the elements of the magnetic core 10 described above are denoted by the same reference numerals as those of the magnetic core 10, and redundant description is omitted.

  The bobbin 50 is made of an insulating nonmagnetic material. The bobbin 50 is formed with a through hole 51 at the center of the constituent elements 11, 12A, 12B, 13, 14, 18 as shown in FIG. 8 and FIG. Only the point is different.

  Note that an insulating resin material such as plastic can be used as the material of the bobbin 50 of the second embodiment.

  As for the manufacturing method of the bobbin 50, a conventional cutting method, injection molding method, compression method or filling method is used. Further, the bobbin 50 may be divided into several members, and each member may be individually molded, and then one bobbin may be combined with an adhesive or the like.

<Magnetic element>
Next, a magnetic element 60 according to the second embodiment will be described with reference mainly to FIGS. Here, FIG. 10 is a perspective view of the magnetic element 60. 11 is a perspective view of a wound bobbin (hereinafter also referred to as “winding bobbin 61”) that is a component of the magnetic element 60, and FIG. 12 is a navel that is a component of the magnetic element 60. It is the front view, top view, and bottom view of pot core 65.

  10 and 11, in the magnetic element 60, elements corresponding to the elements of the magnetic element 20 described above are given the same reference numerals as in the case of the magnetic element 20 within a range that does not cause misunderstanding. .

  As shown in FIG. 10, the magnetic element 60 includes a winding bobbin 61. In addition, the magnetic element 60 includes a naveled pot core 65.

  As shown in FIG. 11, the winding bobbin 61 includes the bobbin 50 described above and a winding 22 formed by winding a conductive wire around the bobbin 50 in the same manner as the winding core 21. And. The winding bobbin 61 includes a first lead portion 23A and a second lead portion 23B, as in the case of the winding core 21. The winding bobbin 61 is manufactured by replacing the magnetic core 10 with the bobbin 50 in the manufacturing method of the winding core 21 described above.

  The naveled pot core 65 is made of a soft magnetic material such as Fe-A1-Si, other than Mn-Zn-based or Ni-Zn-based ferrite having a predetermined insulation rate, as in the case of the pot core 25 described above. A metal, an amorphous metal, or a mixture of two or more of these materials can be used. However, the magnetic core is required to have a predetermined insulation rate or higher. As shown in FIG. 12, the pot core 25 has a cylindrical shape with one bottom portion having a bottom, and a core portion 66 extending along the central axis direction in a region including the central axis. Have.

  The naveled pot core 65 has an outer diameter that substantially matches the outer diameter of the base portion 18 of the bobbin 50 described above, and an axial length that extends from the upper surface of the base portion 18 of the bobbin 50 to the upper surface of the top collar 13. It is longer than the length. Further, the diameter of the core portion 66 is slightly shorter than the diameter of the through hole 51. For this reason, in the inner space of the naveled pot core 65, the base collar part 11, the winding core part 12, the intermediate collar part 14, and the top collar part 13 of the magnetic core 10 can be stored, and the core part 66 penetrates. It can be inserted into the hole 51.

  When manufacturing the magnetic element 60 having such components, first, a winding bobbin 61 is formed by winding a conductive wire around the bobbin 50 as described above. Subsequently, after covering the navel-attached pot core 65 from above the winding bobbin 61 (on the top flange 13 side) while inserting the core portion 66 into the through hole 51, it is fixed using an adhesive. As a result, the magnetic element 60 shown in FIG. 10 is manufactured.

  According to the bobbin and magnetic element of the second embodiment described above, the same effects as the magnetic core and magnetic element of the first embodiment described above can be obtained, and the same modifications can be made.

  Instead of the navel pot core used in the second embodiment, a combination of a pot core and an I-type core, a combination of two E-type cores, a combination of an E-type core and an I-type core, or the like may be employed. .

  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 first and second embodiments described above, the number of intermediate hooks is one, and the number of individual winding parts (first winding part and second winding part) is two. On the other hand, the number of intermediate hooks may be two or more, and the number of individual winding portions may be three or more.

  Moreover, in said 1st and 2nd embodiment, although the diameter of the 1st core part and the diameter of the 2nd core part were made the same, it is good also as a mutually different diameter.

  Moreover, in said 1st and 2nd embodiment, although the winding number of the 1st core part and the winding number of the 2nd core part were made the same, it is good also as a mutually different winding number.

  In the first and second embodiments described above, the fifth notch and the sixth notch are provided in the top collar, but the notch may not be provided in the top collar.

The reel member according to the present invention and the magnetic element using the reel member can be widely applied in the fields of lighting, in-vehicle use, and other consumer electronic devices.

DESCRIPTION OF SYMBOLS 10 ... Magnetic core 11 ... Base collar part 11a ... 1st notch part 11b ... 2nd notch part 12 ... Core part 12A ... 1st core part 12B ... First 2 core part 13 ... top collar part 13a ... fifth notch part 13b ... sixth notch part 14 ... intermediate collar part 14a ... third notch part 14b ... fourth notch part 18 ... Base 19A ... 1st metal terminal 19B ... 2nd metal terminal 20 ... Magnetic element 21 ... Winding core 22 ... Winding part 22A ... 1st volume Wire part 22B ... 2nd winding part 23A ... 1st lead part 23B ... 2nd lead part 25 ... Pot core 50 ... Bobbin 51 ... Through-hole 60 ... Magnetic element 61・ ・ ・ Winding bobbin 65 ・ ・ ・ Pot core with navel 66 ・ ・ ・ Core

Claims (19)

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 intermediate brim part is formed at a predetermined place between both end faces of the core part,
The base collar portion is provided with a first notch portion having a first depth equal to or less than a depth to a radial position of the outer periphery of the core portion, and a position where the first notch portion is provided. A second notch having a second depth shallower than the first depth is provided at a different position;
The intermediate flange portion has a third depth not greater than the depth to the radial position of the outer periphery of the core portion at a position parallel to the axial direction of the core portion with respect to the first notch portion. A third cutout is provided, and a fourth cutout having a fourth depth shallower than the third depth is provided at a position parallel to the axial direction of the core portion with respect to the second cutout. ,
A reel member characterized by that.   2. The reel member according to claim 1, wherein the first depth and the third depth are depths up to a radial position of an outer periphery of the core portion. 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 and the diameter of the second core part are the same.
The reel member according to claim 1 or 2.   The length of the said 1st core part is longer than the length of the said 2nd core part, The reel member of Claim 3 characterized by the above-mentioned.   The reel member according to any one of claims 1 to 4, wherein the reel member is a magnetic core made of a magnetic material. The reel member according to any one of claims 1 to 4, wherein the reel member is a bobbin made of an insulating material.
  The reel member according to claim 6, wherein a through-hole extending along an axis of the core part is formed in the core part.   The reel member according to claim 6, wherein a through-hole extending along an axis of the core part is formed in the core part.   The magnetic element according to claim 8, wherein the first depth is a depth to a radial position of the outer periphery of the core portion. 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 and the diameter of the second core part are the same.
The magnetic element according to claim 8, wherein the magnetic element is a magnetic element.   The length of the said 1st core part is longer than the length of the said 2nd core part, The magnetic element of Claim 10 characterized by the above-mentioned. 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 third notch part;
The first winding part includes a winding start end of the winding part;
The second winding part includes a winding end of the winding part;
The winding start end is connected to a first metal terminal via a first lead portion passing through the first cutout portion,
The winding end is connected to a second metal terminal via a second lead portion passing through the second notch portion and the fourth notch portion,
A spacer member made of an insulating member is interposed between the second lead portion and the first winding portion.
The magnetic element according to claim 10 or 11, wherein the magnetic element is a magnetic element.   The magnetic element according to claim 12, wherein the spacer member is an insulating tape. 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 third notch part;
The first winding part includes a winding start end of the winding part;
The second winding part includes a winding end of the winding part;
The winding start end is connected to a first metal terminal via a first lead portion passing through the first cutout portion,
The winding end is connected to a second metal terminal via a second lead portion passing through the second notch portion and the fourth notch portion,
Only a space is interposed between the second lead portion and the first winding portion,
The magnetic element according to claim 10 or 11, wherein the magnetic element is a magnetic element.   The magnetic element according to claim 8, wherein the reel member is a magnetic core made of a magnetic material.   The magnetic element according to claim 15, further comprising a pot core.   The magnetic element according to claim 8, wherein the reel member is a bobbin made of an insulating material.   The magnetic element according to claim 17, wherein the core part is formed with a through hole extending along an axis of the core part.   The magnetic element according to claim 18, wherein a core part of a naveled pot core is inserted into the through hole.

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