JP2013182927A - Coil component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coil component that has stable characteristics even when made thin, and reduces trouble such that a conductor is unwound and so on.SOLUTION: An outer periphery of a second conductor wound in a second section 14 is wound with an auxiliary conductor insulated from the second conductor. A main intermediate partition wall 26a which projects radially from a shell of a first section 12 and the second section 14, arranged in a roll direction X, is formed between the first section 12 and the second section 14. A main cut 80 through which a first lead portion 34a and a second lead portion 34b can pass is formed in at least a circumferential part of an outer peripheral edge portion of the main intermediate partition wall 26a. The first lead portion 34a and the second lead portion 34b are arranged in the main cut 80 while crossing each other. The first lead portion 34a arranged in the main cut 80 in the crossing state and arranged radially inside is connected to a first terminal 40 positioned more outside in an array direction Y among a plurality of first terminals 40 than the second lead portion 34b arranged outside.

Description

  The present invention relates to a coil component suitably used as, for example, a transformer for a thin electronic device or the like.

  For example, in a thin electronic device such as a thin TV and a portable computer, a thin transformer for converting voltage is required. As an example of such a transformer, for example, a transformer disclosed in Japanese Utility Model Laid-Open No. 5-48313 has been proposed.

  However, in the conventional transformer described above, since the partition wall has a predetermined thickness so as to satisfy the safety standard, it is difficult to increase the magnetic coupling between the primary winding and the secondary winding. . In recent years, in particular, there has been an increasing demand for higher frequencies for transformers, and leakage inductances are required to have a smaller value. However, since the safety standards must be satisfied as described above, it is necessary to increase the magnetic coupling. It was difficult to reduce the leakage inductance value.

  In recent years, there has been an increasing demand for miniaturization and low profile for transformers, and bobbins have been miniaturized and low profile. When the bobbin is reduced in size and height, the space for winding the primary winding and the secondary winding is reduced, but the partition wall must be secured with a predetermined thickness as described above. Therefore, it has been difficult to secure a space for the winding. In other words, securing the partition plate with a predetermined thickness has hindered miniaturization and low profile.

  Therefore, a novel transformer that satisfies safety standards, has high magnetic coupling between the primary winding and the secondary winding, and is reduced in size and height has been proposed (Patent Document 2).

  However, recently, thinner electronic devices have been developed, and there is an increasing demand for transformers to be made thinner, and there is a demand for coil components that can suppress voltage fluctuations even if they are made thinner. . Moreover, when it is going to make a coil component thin and to improve a characteristic, it has the subject that it will become the structure where the wound conducting wire becomes easy to unwind.

Japanese Utility Model Publication No. 5-48313 JP 2011-165709 A

  The present invention has been made in view of such a situation, and an object of the present invention is to provide a coil component that has stable characteristics even when it is thin, and that has less problems such as unwinding of a conductive wire.

In order to achieve the above object, the coil component according to the present invention comprises:
A bobbin in which a first body part around which the first conductor is wound and a second body part around which the second conductor is wound are formed at least along the winding axis direction;
A coil component having a plurality of first terminals and second terminals provided at both ends of the bobbin along the winding axis direction, respectively, along an arrangement direction intersecting with the winding axis,
On the outer periphery of the second conducting wire wound around the second body portion, an auxiliary conducting wire is wound insulated from the second conducting wire,
Between the first body part and the second body part arranged along the winding axis direction, a main intermediate partition wall protruding radially outward from these body parts is formed. ,
A main notch through which the first lead portion and the second lead portion that are both ends of the auxiliary conducting wire can pass is formed in at least a part of the outer peripheral edge portion of the main intermediate partition wall,
The first lead portion and the second lead portion of the auxiliary lead wire are arranged so as to intersect with each other in the main cutout, and are connected to each of the plurality of first terminals,
Of the first lead portion and the second lead portion, the second lead portion is arranged such that the first lead portion arranged so as to intersect with the main notch and arranged radially inside is arranged outside in the radial direction. Compared to the first terminal, a plurality of the first terminals are connected to the first terminals located outside in the arrangement direction.

  In the coil component according to the present invention, the auxiliary conductor is wound around the outer periphery of the second conductor wound around the second body portion so as to be insulated from the second conductor. The first lead portion and the second lead portion of the auxiliary conducting wire are connected to the first terminal. For this reason, even if the coil component is made thinner, the voltage fluctuation is reduced, and for example, when used as a transformer, a coil component having stable characteristics can be realized.

  Moreover, in the coil component according to the present invention, the first lead portion and the second lead portion of the auxiliary conducting wire are arranged so as to intersect each other at the main notch. Moreover, of the first lead portion and the second lead portion, the first lead portion that is arranged to intersect with the main notch and is arranged on the inner side in the radial direction is the second lead portion that is arranged on the outer side in the radial direction. As compared with the first terminal, the plurality of first terminals are connected to the first terminals located outside in the arrangement direction. For this reason, the 1st lead part which is the winding start of an auxiliary conducting wire is pressed down to the 2nd lead part which is the winding end part of an auxiliary conducting wire in a main notch part. Therefore, it can suppress that an auxiliary | assistant conducting wire is unwound. Moreover, the winding process by an automatic winding machine is also facilitated. Moreover, even if the main partition wall is projected to the outside in the radial direction to the minimum and the size of the main notch is designed to be minimal, the auxiliary conductor can be prevented from being unwound. It becomes easy to reduce the thickness of parts.

Preferably, at least one intermediate body part is formed between the first body part and the second body part,
The auxiliary conducting wire constituting the first lead portion passes at least a part of the outer periphery of the intermediate body portion along the circumferential direction.

  By forming the intermediate body portion between the first body portion and the second body portion, it is possible to satisfactorily ensure insulation between the winding portion of the first conductor and the winding portion of the second conductor. Also, by adjusting the length of the intermediate body in the winding axis direction (relatively long), the insulation distance can be increased, so that the protruding height of the intermediate partition wall formed therebetween is reduced. This contributes to thinning (also referred to as low profile) of coil parts.

  Furthermore, the voltage of the auxiliary winding can be easily adjusted by passing at least a part of the outer circumference of the intermediate body portion along the circumferential direction through the auxiliary lead wire constituting the first lead portion. Also, when the main notch has a large crossing angle between the first lead portion and the second lead portion, the main partition wall has a small protruding height and the groove depth of the main notch is shallow (when the profile is reduced) In this case, the first lead portion and the second lead portion are further less likely to come off. Further, the winding process by the automatic winding machine is further facilitated.

Preferably, along the winding axis direction, the main intermediate partition wall and the auxiliary intermediate partition wall are respectively formed at both ends in the winding axis direction of the intermediate body part.
An auxiliary notch is formed at two or more locations in the circumferential direction of the outer edge of the auxiliary intermediate partition wall,
The first lead portion and the second lead portion respectively pass through auxiliary notches having different positions in the circumferential direction, and intersect at the main notch.

  According to such a structure, even when the protruding height of the main partition wall is small and the groove depth of the main notch is shallow (in the case of low profile), the first lead portion and the second lead portion are further detached. It becomes difficult. Further, the winding process by the automatic winding machine is further facilitated.

At least one intermediate body part is formed between the first body part and the second body part,
Along the winding axis direction, the main intermediate partition wall and the auxiliary intermediate partition wall are respectively formed at both ends in the winding axis direction of the intermediate body part,
An auxiliary notch is formed at one or more locations in the circumferential direction of the outer edge of the auxiliary intermediate partition wall,
The first lead portion and the second lead portion may be configured to pass through the same auxiliary cutout and intersect at the main cutout.

  In this case, the main cutout and the auxiliary cutout may be respectively formed on the main intermediate partition wall and the auxiliary intermediate partition wall at the same circumferential position.

  Preferably, the first lead portion is connected to the first terminal located on the outermost side in the arrangement direction of the plurality of first terminals, and the second lead portion is located on the second outermost side. Connected to one terminal. The lead portion of the first conducting wire is connected to the other first terminals. The second terminal is connected to a lead portion of a single or plural second conductors.

  Preferably, a core mounting hole penetrating in the winding axis direction is formed inside the first body portion and the second body portion, and the core is mounted in the core mounting hole. By installing a core such as a ferrite core in the core mounting hole, the characteristics are greatly improved.

FIG. 1 is a perspective view of a transformer as a coil component according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the transformer shown in FIG. 3 is a rear perspective view showing the bobbin of the transformer shown in FIG. 4 is a perspective view of a main part of FIG. 5A and 5B are rear views of the main part of the bobbin showing the winding sequence. 6 is a view showing an example of a cross-sectional view taken along the line VI-VI in FIG. FIG. 7 is a conceptual diagram showing an example of the circuit of the transformer shown in FIG. FIG. 8A to FIG. 8C are partial schematic views showing examples of the shape of notches formed in the partition wall. FIG. 9 is a main part rear view of a bobbin corresponding to FIG. 5 of a transformer as a coil component according to another embodiment of the present invention.

Hereinafter, the present invention will be described based on embodiments shown in the drawings.
First Embodiment As shown in FIG. 1, a transformer 2 as a coil component according to an embodiment of the present invention has a case 50. As shown in FIG. 2, the case 50 is configured to cover the bobbin 10 from above. The bobbin 10 has a through hole 28 extending along the winding axis direction (X-axis direction), and communicates with the insertion hole 56 a formed in the case 50 when the case 50 is attached to the bobbin 10. From there, the middle leg portion 68 of each core 60 can be removably inserted into the through hole 28.

  The bobbin 10 has the 1st division 12, the intermediate | middle division 16, and the 2nd division 14 in order along a winding axis direction (X-axis direction). In this embodiment, the first section 12, the intermediate section 16, and the second section 14 are single, but a plurality may be formed along the winding axis direction (X-axis direction).

  At both ends of the bobbin 10 in the X-axis direction, a first terminal holding part 21 and a second terminal holding part 23 that are elongated along the Y-axis perpendicular to the X-axis are integrally formed. A plurality of first terminals 40 are arranged in the first terminal holding portion 21 at predetermined intervals along the Y-axis direction. A plurality of second terminals 42 are arranged in the second terminal holding portion 23 at predetermined intervals along the Y-axis direction.

  In this embodiment, these terminals 40 and 42 are pin-shaped terminals, but may be terminals of other shapes. In this embodiment, the first terminal 40 is the primary terminal of the primary coil, the second terminal 42 is the secondary terminal of the secondary coil, and the number of terminals 40 is configured to be smaller than the number of terminals 42. However, it is not limited to this.

  The first section 12 and the intermediate section 16 in the bobbin 10 are partitioned by a flange-shaped main intermediate partition wall 26a, and the intermediate section 16 and the second section 14 are auxiliary intermediate partition walls 26b similar to the main intermediate partition wall 26a. It is partitioned by. Flange-shaped end partition walls 26c and 26c are formed between the first section 12 and the first terminal holding section 21 and between the second section 14 and the second terminal holding section 23, respectively. The end partition walls 26c and 26c are the same as the main intermediate partition wall 26a and the auxiliary intermediate partition wall 26b except that they do not have notches 80 and 82 described later, and are formed integrally with the bobbin 10.

  The case 50 is detachably mounted from the upper part of the bobbin 10 in the Z-axis (X-axis and Y-axis perpendicular to each other) direction. The case 50 has a substrate 52 parallel to the X axis and the Y axis, and covers the upper portions of the first terminal holding part 21 and the second terminal holding part 23 in the Z axis direction. Lower side plates 54 are respectively formed integrally with the substrate 52 at both ends in the Y-axis direction of the substrate 52. The lower side plate 54 is configured to cover the ends of the terminal holding portions 21 and 23 in the Y-axis direction.

  A side wall 56 that rises in the Z-axis direction is formed integrally with the substrate 52 at the center of the substrate 52 in the X-axis and Y-axis directions. An upper plate 58 is formed integrally with the side wall 56 on the upper side of the side wall 56 in the Z-axis direction. The side wall 56 is configured to cover the first section 12, the intermediate section 16, and the second section 14 of the bobbin 10 from the side, and the upper plate 58 is configured to cover the first section 12, the intermediate section 16, and the first section of the bobbin 10. The two compartments 14 are configured to cover from above.

  A through hole 58a is formed in the upper plate 58, and the first section 12 in the bobbin 10 can be observed through the through hole 58a. On the outer peripheral edge of the upper plate 58, a convex portion 58b is formed integrally with the upper plate 58, and the magnetic shielding plate 70 is easily mounted on the upper surface of the upper plate 58 in the Z-axis direction. The magnetic shielding plate 70 is made of, for example, aluminum and has a function of shielding magnetism.

  The upper plate 58 protrudes on both sides in the X-axis direction and the Y-axis direction from the side wall 56, and the width of the upper plate 58 in the X-axis direction is the length of the outer legs 64 of the pair of cores 60 in the X-axis direction. It is approximately equal to the plus length. Further, the width of the upper plate 58 in the Y-axis direction is substantially equal to the length of the base portion 62 of each core 60 in the Y-axis direction.

  The height of the side wall 56 in the case 50 in the Z-axis direction is the first section including the end partition wall 26c in the bobbin 10 from the lower side in the Z-axis direction inside the space surrounded by the side wall 56 and the upper plate 58. 12 so that the entire second section 14 can enter. The width of the side wall 56 in the X-axis direction and the Y-axis direction is determined in the same manner.

  Note that the height in the Z-axis direction of the side wall 56 corresponds to the gap width between the upper plate 58 and the substrate 52, and the gap width in the Z-axis direction of the base portion 62 and the outer leg portion 64 in the core 60. The width is set slightly wider than the width. On both sides of the side wall 56 in the X-axis direction, bases 62 of the cores 60 are detachably mounted in the gaps between the upper plate 58 and the substrate 52.

  Insertion holes 56a into which the middle leg portions 68 of the respective cores 60 can be inserted are formed on both sides of the side wall 56 in the X-axis direction so as to communicate with the through holes 28 formed in the bobbin 10. The insertion hole 56a and the through-hole 28 are designed to have dimensions that allow the middle leg portion 68 of each core 60 to be inserted. The width of the side wall 56 in the Y-axis direction is designed so that the outer leg portion 64 of the core 60 can be disposed on the outer surface of the side wall 56 in the Y-axis direction.

  The width of the side wall 56 in the X-axis direction is determined so that the tips of the outer leg portions 64 of the pair of cores 60 abut each other as shown in FIG. The In this state, the ends of the middle leg portions 68 of the pair of cores 60 are butted in the X-axis direction inside the through hole 28 of the bobbin 10 as shown in FIG.

  In the present embodiment, each core 60 is a substantially E-shaped core, and includes a base portion 62 that is elongated in the Y-axis direction, a middle leg portion 68 that protrudes in the X-axis direction from the center portion of the base portion 62 in the Y-axis direction, and a base portion. And a pair of outer legs 68 projecting in the X-axis direction from both ends of the Y-axis direction of 62. Each core 60 is made of, for example, a ferrite material or a metal magnetic material. As the metal magnetic material, iron powder, sendust, Fe—Si alloy, permalloy, amorphous, or the like can be used, and as the ferrite, a high saturation magnetic flux density material, a low loss material, or the like can be used.

  As shown in FIG. 6, in the first section 12, the first conducting wire 30 is wound around the outer periphery of the hollow first body portion 20 that is a part of the bobbin 10. The first conducting wire 30 is, for example, a primary side conducting wire, and is preferably composed of an insulation coated conducting wire. The first conducting wire 30 is wound around the outer periphery of the first body portion 20 through which the middle leg portion 68 of the core 60 is inserted, thereby constituting the primary coil 30A shown in FIG.

  An insulating tape 36 is wound around the outer periphery of the winding portion of the first conducting wire 30 shown in FIG. Another first conducting wire 30 constituting another primary side coil may be wound around the outer periphery of the insulating tape 36, and other insulating tape 36 may be wound around the outer periphery of the winding portion. good.

  In the second section 14, the second conducting wire 32 is wound around the outer periphery of the hollow second body portion 20 that is a part of the bobbin 10. The second conducting wire 32 is, for example, a secondary conducting wire, and is preferably composed of an insulation coated conducting wire. The second conducting wire 32 is wound around the outer periphery of the second body portion 22 through which the middle leg portion 68 of the core 60 is inserted, thereby constituting the secondary coil 32A shown in FIG.

  An insulating tape 38 is wound around the outer periphery of the winding portion of the second conducting wire 32 shown in FIG. Another second conducting wire 32 (for example, the second conducting wire 32a1 shown in FIG. 7) that constitutes another secondary coil may be wound around the outer periphery of the insulating tape 38. The other insulating tape 38 may be wound. Another second conducting wire 32a1 shown in FIG. 7 is wound on the second conducting wire 32 via an insulating tape 38 (not shown), so that a secondary side coil 32A1 different from the secondary side coil 32A is provided. Configure. In this way, a plurality of secondary coils can be formed. The same applies to the primary coil.

  The insulating tapes 36 and 38 are made of a resin such as PET (polyethylene terephthalate).

  In the intermediate section 16 shown in FIG. 6, in this embodiment, the first body part 20 and the second body part 22 are integrated and connected to form an internal body part that has a continuous through hole 28 in the X-axis direction. The conducting wire is not wound around the outer periphery of 24. The intermediate body portion 24 and the partition walls 26a and 26b have a function of insulating the coil portion of the first section 12 and the coil portion of the second section 14 in the Z-axis direction.

  By making the length of the intermediate body portion 24 in the X-axis direction longer than that in the past, the insulating walls are secured, and the partition walls 26a to 26c are radially outward from the body 20, 22, 24. The protruding height can be reduced, and the thickness of the coil device 2 in the Z-axis direction can be reduced (low profile).

  The body 20, 22, 24, the partition walls 26a to 26c, and the terminal holding portions 21 and 23 are made of an insulating member, and are integrally formed with the terminals 40 and 42 made of a conductive member to form the bobbin 10. It is possible to mold. By inserting the terminals 40 and 42 into the mold and injection molding the insulating resin, the bobbin 10 in which the terminals 40 and 42 are integrated can be formed. Examples of the insulating member constituting the bobbin 10 excluding the terminal electrodes 40 and 42 include phenol resin.

  Case 50 is made of an insulating member such as PET resin or PBT resin, and is formed by injection molding, for example. The insulating member constituting the bobbin 10 is formed integrally with the terminals 40 and 42, and the terminals 40 and 42 conduct heat at the time of solder connection, and therefore, compared to the insulating member constituting the case 50. Heat resistance is required.

  In this embodiment, in the 2nd division 14 shown in FIG. 6, the insulating tape 38 wound around the outer side of the 2nd conducting wire 32 located in the radial direction outermost side among the 2nd conducting wires 32 which comprise a secondary side coil. The auxiliary conducting wire 34 is wound around the outside. The auxiliary conducting wire 34 is wound on the outermost side in the second section 14, but constitutes the primary side coil 34 </ b> A shown in FIG. 7 instead of the secondary side coil. The auxiliary conducting wire is composed of an insulation coated conducting wire, like the other conducting wires. The insulation-coated conductor is not particularly limited, and for example, a copper wire coated with an insulation coating such as urethane, more specifically, a three-layer insulation wire (applicable safety standard: IEC60065, etc.) is used. Also good.

  As shown in FIGS. 3 and 4, lead portions 34a and 34b formed at both ends of the auxiliary conducting wire 34 are drawn in the direction of the first terminal 40 in order to make the winding portion of the auxiliary conducting wire 34 a primary coil. It is necessary to connect to one of the first terminals 40.

  In the present embodiment, the first lead portion 34a and the second lead portion 34b pass through two positions on the back side corners in the Z-axis direction, which is at least a part of the outer peripheral edge of the main intermediate partition wall 26a. A possible main cutout 80 is formed. Further, in this embodiment, not only the main intermediate partition wall 26a but also the two positions on the back side corners in the Z-axis direction, which is at least part of the circumferential direction of the outer peripheral edge of the auxiliary intermediate partition wall 26b. An auxiliary notch 82 through which the lead portion 34a and the second lead portion 34b can pass is formed.

  The main cutout 80 and the auxiliary cutout 82 are formed at the same position along the circumferential direction and have the same shape. For example, as shown in FIG. 8A, the main cutout 80 (same as the auxiliary cutout 82) is a rectangular cutout having a curvature R at its corners, and its width w1 and depth d1 are as follows. These may be the same as or different from each other, but w1 / h and / or d1 / h is 1 with respect to the radial protrusion height h (height from the body 20) of the partition wall 26a (same as 26b). Less than (h-w1) and (h-d1) are determined to be equal to or greater than the winding thickness of the conductor.

  Note that the shape of the notch 80 (same for 82) is not limited to the shape shown in FIG. 8A, but a semicircular concave groove shape shown in FIG. 8B, and a triangular shape shown in FIG. 8C. It may be a groove shape or other shapes. In these embodiments, the main cutout 80 and the auxiliary cutout 82 have the same shape, but may have different shapes. Further, the main cutout 80 and the auxiliary cutout 82 may be formed at different positions in the circumferential direction.

  In this embodiment, as shown in FIGS. 4 and 5A, when winding of the conductors other than the auxiliary conductor 34 is completed, first, the winding of the auxiliary conductor 34 is started by a winding machine (not shown). The first lead portion 34a that is the end is entangled with the first terminal 40 that is located on the outermost side in the arrangement direction (Y-axis direction) of the first terminals 40. Next, the first lead portion 34a is passed over the insulating tape 36 wound around the outside of the first section 12 by the winding machine in the X-axis direction, and the first lead located on the outermost side in the Y-axis direction. The notches 80 and 82 closest to the terminal 40 are passed in the X-axis direction.

  Thereafter, the auxiliary conducting wire 34 is wound around the outer periphery of the insulating tape 38 wound around the second section 14 by a winding machine with a predetermined number of turns. The winding direction is not particularly limited, but is preferably a winding direction in which the first winding direction is directed from the notch 82 to the longitudinal direction (Y-axis direction) of the partition wall 26b. This is because it is difficult for the first lead portion 34a to be detached from the notch 82 during the winding process by the winding machine.

  After winding the auxiliary conducting wire 34 with a predetermined number of turns, the first lead portion 34a engages the second lead portion 34b, which is the winding end portion, with the winding machine as shown in FIG. 5B. Through the notches 82 and 80. At that time, the second lead portion 34b passes through the notches 82 and 80 so as to intersect and overlap the first lead portion 34a from above the first lead portion 34a, and the first lead portion 34a is entangled. It binds to the first terminal 40 located inside the arrangement direction (Y-axis direction) of the first terminals 40.

  In this embodiment, the first lead portion 34a is connected to the outermost first terminal 40 in the arrangement direction of the plurality of first terminals 40, and the second lead portion 34b is the second outer side. However, the present invention is not limited to this.

  The lead part of the single or plural first conductors wound inside the insulating tape 12 is connected to the first terminal 40 other than the first terminal 40 around which the lead parts 34a and 34b are entangled with the auxiliary conductor 34. Although it is entangled in the process before the winding process, the illustration is omitted. The lead portion of the single or plural second conductors wound inside the insulating tape 12 is also entangled with one of the second terminals 42 in the step before the auxiliary conductor 34 winding step. The illustration is omitted. The lead portions entangled with the terminals 40 and 42 are subjected to an insulating film removal process and a solder connection process of the conductive wires in a subsequent process, and electrical connection and mechanical connection between the lead parts and the terminals are performed. An insulating tape may be further wound around the outer periphery of the winding portion of the auxiliary conducting wire 34 in the second section 14 to insulate and fix the auxiliary conducting wire 34.

  In the transformer 2 according to the present embodiment, the winding portion of the first conducting wire 30 and the winding of the second conducting wire 32 are formed by forming the intermediate trunk portion 24 between the first trunk portion 20 and the second trunk portion 22. It is possible to satisfactorily ensure insulation from the part. In addition, by adjusting (relatively long) the length of the intermediate body portion 24 in the winding axis direction (X-axis direction), the insulation distance can be increased, so that intermediate partition walls 26a formed between them can be obtained. The protrusion height h (see FIG. 8A) of 26b can be reduced, which contributes to the thinning (also referred to as low profile) of the transformer 2 in the Z-axis direction. The length of the intermediate body portion 24 in the winding axis direction (X-axis direction) is not less than the insulation length required by the safety standard, and is preferably set to 8 mm or more.

  Further, in the present embodiment, as shown in FIG. 6, the auxiliary conductor 34 is insulated from the second conductor 32 by the insulating tape 38 on the outer periphery of the second conductor 32 wound around the second body portion 22. It is wound. As shown in FIGS. 3 and 5B, the first lead portion 34 a and the second lead portion 34 b of the auxiliary conducting wire 34 are connected to the first terminal 40. For this reason, even if the thickness of the transformer 2 in the Z-axis direction is reduced, voltage fluctuations are reduced and stable characteristics are obtained.

  Moreover, the first lead portion 34 a and the second lead portion 34 b of the auxiliary conducting wire 34 are arranged so as to intersect at the notches 80 and 82. In addition, of the first lead portion 34a and the second lead portion 34b, the first lead portion 34a that is arranged so as to intersect at the main notch 80 and is arranged on the inner side in the radial direction (lower side in the lead wire overlapping direction). Is connected to the first terminal 40 located on the outer side in the arrangement direction as compared with the second lead portion 34b arranged on the outer side in the radial direction (upper side in the lead wire overlapping direction).

For this reason, at least in the main cutout portion 80, the first lead portion 34 a that is the start of winding of the auxiliary conducting wire 34 is pressed against the second lead portion 34 b that is the end of winding of the auxiliary conducting wire 34. Therefore, it is possible to prevent the auxiliary conducting wire 34 from being unwound. Moreover, the winding process by an automatic winding machine is also facilitated. In addition, even if the main partition wall 26a is projected to the outside in the radial direction (height h shown in FIG. 8) and the dimensions (w1, d1) of the main notch 80 are designed to be minimal, the auxiliary Since the unwinding of the conducting wire 34 can be suppressed, it is easy to reduce the thickness of the transformer 2.
Second embodiment

  As shown in FIG. 9, in the transformer of the present embodiment, the auxiliary conducting wire 34 constituting the first lead portion 34 a passes at least part of the outer periphery of the intermediate body portion 24 along the circumferential direction. This is the same as the transformer of the first embodiment, and a duplicate description will be omitted, and the differences will be described in detail.

  As shown in FIG. 9, in this embodiment, auxiliary notches 82 are formed at two or more locations in the circumferential direction of the outer edge portion of the auxiliary intermediate partition wall 26b, and the first lead portion 34a and the second lead portion 34b. Is configured to pass through auxiliary cutouts 82 having different positions in the circumferential direction and intersect at a single main cutout 80 formed in the main partition wall 26a.

  In the main cutout 80, as in the first embodiment, the second lead portion 34b overlaps and intersects radially outside the first lead portion 34a (upper side in the overlapping direction). The winding direction of the first lead portion 34a in the intermediate section 16 is the same as the winding direction of the auxiliary conducting wire 34 in the second section 14 shown in FIG. Moreover, the winding direction of the auxiliary conducting wire 34 in the second section 14 shown in FIG. 9 is also the same as the winding direction of the auxiliary conducting wire 34 in the second section 14 shown in FIG.

  In the present embodiment, the number of turns of the auxiliary conducting wire 34 constituting the first lead portion 34a is 1/2 or less, but any number of turns of 1 or more or 1 or less may be used, but it is preferably less than 1.

In the present embodiment, it is easy to adjust the voltage with respect to the auxiliary winding 34 by passing at least a part of the outer periphery of the intermediate section 16 along the circumferential direction of the auxiliary conducting wire 34 constituting the first lead portion 34a. . Further, in the main cutout 80, the crossing angle between the first lead portion and the second lead portion is increased, the protruding height h of the main partition wall 26a (see FIG. 5A) is small, and the dimensions of the main cutout 80 are large. Even when w1 and d1 are small (when the height is low), the first lead portion 34a and the second lead portion 34b are more difficult to come off. Further, the winding process by the automatic winding machine is further facilitated.
Further, in the present embodiment, in the auxiliary intermediate partition wall 26, the lead portions 34 a and 34 b are disposed in the auxiliary notch portions 82, so that the degree of fit of the lead portions 34 a and 34 b with respect to the notch portions 82 is adjusted. improves.

  The present invention is not limited to the above-described embodiment, and can be variously modified within the scope of the present invention.

  For example, the coil component according to the present invention can be used for a magnetic coupling element or the like for uses other than a transformer.

DESCRIPTION OF SYMBOLS 2 ... Transformer 10 ... Bobbin 12 ... 1st division 14 ... 2nd division 16 ... Intermediate division 20 ... 1st fuselage part 22 ... 2nd fuselage part 24 ... Intermediate fuselage part 26a ... Main intermediate partition wall 26b ... Auxiliary intermediate partition wall 26c ... End partition wall 30 ... First conductor 32 ... Second conductor 34 ... Auxiliary conductor 34a ... First lead part 34b ... Second lead part 36, 38 ... Insulating tape 40 ... First terminal 42 ... Second terminal 50 ... Case 60 ... Core 80 ... Main cutout 82 ... Auxiliary cutout

Claims (7)

A bobbin in which a first body part around which the first conductor is wound and a second body part around which the second conductor is wound are formed at least along the winding axis direction;
A coil component having a plurality of first terminals and second terminals provided at both ends of the bobbin along the winding axis direction, respectively, along an arrangement direction intersecting with the winding axis,
On the outer periphery of the second conducting wire wound around the second body portion, an auxiliary conducting wire is wound insulated from the second conducting wire,
Between the first body part and the second body part arranged along the winding axis direction, a main intermediate partition wall protruding radially outward from these body parts is formed. ,
A main notch through which the first lead portion and the second lead portion that are both ends of the auxiliary conducting wire can pass is formed in at least a part of the outer peripheral edge portion of the main intermediate partition wall,
The first lead portion and the second lead portion of the auxiliary lead wire are arranged so as to intersect with each other in the main cutout, and are connected to each of the plurality of first terminals,
Of the first lead portion and the second lead portion, the second lead portion is arranged such that the first lead portion arranged so as to intersect with the main notch and arranged radially inside is arranged outside in the radial direction. Compared to the above, a coil component connected to the first terminal located outside in the arrangement direction of the plurality of first terminals. At least one intermediate body part is formed between the first body part and the second body part,
2. The coil component according to claim 1, wherein the auxiliary conducting wire constituting the first lead portion passes through at least a part of an outer periphery of the intermediate body portion along a circumferential direction. Along the winding axis direction, the main intermediate partition wall and the auxiliary intermediate partition wall are respectively formed at both ends in the winding axis direction of the intermediate body part,
An auxiliary notch is formed at two or more locations in the circumferential direction of the outer edge of the auxiliary intermediate partition wall,
3. The coil component according to claim 2, wherein the first lead portion and the second lead portion respectively pass through auxiliary notches having different positions in the circumferential direction and intersect at the main notch. At least one intermediate body part is formed between the first body part and the second body part,
Along the winding axis direction, the main intermediate partition wall and the auxiliary intermediate partition wall are respectively formed at both ends in the winding axis direction of the intermediate body part,
An auxiliary notch is formed at one or more locations in the circumferential direction of the outer edge of the auxiliary intermediate partition wall,
The coil component according to claim 1, wherein the first lead portion and the second lead portion pass through the same auxiliary notch and intersect at the main notch.   5. The coil component according to claim 4, wherein the main notch and the auxiliary notch are respectively formed on the main intermediate partition wall and the auxiliary intermediate partition wall at the same circumferential position.   The first lead portion is connected to the first terminal located on the outermost side in the arrangement direction of the plurality of first terminals, and the second lead portion is connected to the first terminal located on the second outer side. The coil component according to claim 1, wherein the coil component is connected.   The core mounting hole penetrating in the winding axis direction is formed inside the first body portion and the second body portion, and the core is mounted in the core mounting hole. The coil component according to crab.

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