JP2012104724A - Inductor component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce an existence number of connections within an inductor component so as to improve reliability.SOLUTION: An inductor component comprises a first coil part 9 which has a first air core part 14 and a second coil part 10 which has a second air core part 15; an intermediate connection part 11 which connects the first coil part 9 and the second coil part 10; a primary coil part 6 where the intermediate connection part 11 is bent to form a folding part 16 in a coil body that includes a first end part 12 at the primary side routed from the first coil part 9 and a second end part 13 at the primary side routed from the second coil part 10, the first coil part 9 and the second coil part 10 are faced to each other with a space part 17 between them, and the first air core part 14 and the second air core part 15 are formed coaxially; a secondary coil part 19 which includes a first end part 20 at the other side, a second end part 21 at the other side, and a secondary air core part 18; and a closed magnetic circuit core 7 which includes a middle leg part 8. The secondary air core part 18 is arranged in the space part 17 and the middle leg part 8 is passed through the first air core part 14, the second air core part 15, and the secondary air core part 18. The intermediate connection part 11 is arranged outside the primary coil part 6 and the secondary coil part 19.

Description

  The present invention relates to an inductor component used in various electronic devices.

  Hereinafter, conventional inductor components will be described with reference to the drawings. In the conventional inductor component, for example, as shown in FIG. 9, a plurality of primary windings 1 and a secondary winding 3 are arranged between the primary windings 1 with an insulating layer 2 interposed between them, and the primary windings of the respective layers are arranged. The connection between the windings 1 and the connection between the secondary windings 3 of each layer were performed by forming a joint portion 5 by soldering or the like to each layer with the connection terminal 4.

JP 2002-64017 A

  In the conventional inductor component, the connection portion 4 is always required for the electrical connection between the layers, and the more the connection portion 4 is present in the inductor component, the more particularly in the use under severe conditions, In order to maintain the reliability of the connection part 4 with respect to the stress caused by vibration or shock received by the inductor component, a method for making a strict and accurate connection, man-hours there, management of the connection state, etc. It has a problem that becomes a cost factor.

  Accordingly, the present invention provides a highly reliable inductor component by reducing the number of connections.

And to achieve this goal,
Using a first flat conductor wire having an insulating coating on the surface,
A first winding portion having a first air core portion wound with its wide surface perpendicular to the winding axis, and a second winding portion having a second air core portion;
An intermediate connection portion connecting the first winding portion and the second winding portion;
One side first end drawn from the first winding portion;
A winding body composed of a second end portion on one side drawn out from the second winding portion,
After the intermediate connecting portion is bent to form an intermediate bent portion, the first winding portion and the second winding portion are opposed to each other by forming a space portion therebetween,
One side winding part formed so as to arrange the first air core part and the second air core part coaxially;
The other side winding portion having the other side first end portion, the other side second end portion and the other side air core portion;
A closed magnetic circuit core having a magnetic leg portion,
Placing the other side air core in the space,
Passing the magnetic leg portion through the first air core portion, the second air core portion and the other air core portion;
The one side first end and the one side second end and the other side first end and the other side fourth end are input / output terminals,
The intermediate connection portion is located outside the one side winding portion and the other side winding portion.

  According to the present invention, the reliability of the winding portion is improved by reducing the number of connection portions in the inductor component, and the insulation between the primary side winding and the secondary side winding is accurately maintained. It is something that can be done.

1 is a first cross-sectional view of an inductor component according to an embodiment of the present invention. 1 is a first exploded perspective view of an inductor component according to an embodiment of the present invention. FIG. 2 is a second cross-sectional view of an inductor component according to an embodiment of the present invention. 3 is a third sectional view of an inductor component according to an embodiment of the present invention. The 2nd disassembled perspective view of the inductor components in one embodiment of the present invention. The exploded top view of the inductor component in one embodiment of the present invention FIG. 4 is a fourth cross-sectional view of the inductor component according to the embodiment of the present invention. The coil part top view of the inductor component in one embodiment of the present invention Cross-sectional view of conventional inductor components

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment)
FIG. 1 is a cross-sectional view of an inductor component according to an embodiment of the present invention, showing a transformer as an example. The primary winding portion 6 is formed by a single continuous flat conductor wire, and the wide surface of the flat conductor wire is formed with respect to the axial direction of the middle leg portion 8 of the closed magnetic circuit core 7 serving as a winding axis. The first winding portion 9 and the second winding portion 10 wound in the vertical direction and the intermediate connection portion 11 that connects the first winding portion 9 and the second winding portion 10 are configured. Further, the first winding portion 9 uses the first side end portion 12 used as one electrode terminal, and the second winding portion 10 uses the one side second end portion 13 used as the other electrode terminal. Each is pulled out.

  Here, as shown in the exploded perspective view of FIG. 2, the first air core portion 14 included in the first winding portion 9 and the second air core portion 15 included in the second winding portion 10 are bent at the intermediate connection portion 11. 16 is formed, and the positional relationship is opposed via the space 17. The first air core part 14 and the second air core part 15 are coaxially positioned so that the first magnetic core part 14 and the second air core part 15 penetrate the middle leg part 8 of the closed magnetic path magnetic core 7. Is forming. The first winding portion 9 and the second winding portion 10 define the winding direction as a summing operation in which the directions of the magnetic flux generated by the current flowing through each of the first winding portion 9 and the second winding portion 10 are the same. As described above, the first side end portion 12 and the one side second end portion 13 are drawn from the primary winding portion 6.

  On the other hand, a rectangular conductor wire having a larger cross-sectional area than the rectangular conductor wire applied in the primary winding portion 6 is applied, and the wide surface is wound in a direction perpendicular to the winding axis in the same manner as the primary winding portion 6, Forming a secondary winding part 19 having a secondary side air core part 18, arranging the secondary side air core part 18 in the space part 17 and coaxially with the first air core part 14 and the second air core part 15; As shown in FIG. 1, a transformer is formed by penetrating the middle leg portion 8 in each of them. Further, as shown in FIG. 2, the other first end portion 20 and the other second end portion 21 used as electrode terminals are drawn out from the secondary winding portion 19.

  Here, as shown in FIG. 2, the intermediate connection portion 11 is formed outside the region where the outer circumferences of the first winding portion 9 and the second winding portion 10 are connected.

  With the above configuration, the first winding portion 9 and the second winding portion 10 are constituted by a continuous conductor having no connection portion, and particularly high connection reliability on the primary side can be obtained. Is. And these maintain the high primary and secondary coupling state by adopting a positional relationship with the secondary winding portion 19 interposed therebetween, and at the same time, the intermediate connection portion 11 is connected to the first winding portion 9 and the second winding portion. A space distance can be obtained from the outer periphery of the portion 10 being drawn out, and a high insulation state between the primary and secondary can be maintained.

  Moreover, the primary winding part 6 and the secondary winding part 19 are both insulated by applying a coated conductor so that even if an electrically conducting part approaches, there is no short circuit and the primary and secondary insulation. It also has an effect in terms of maintaining the sex. Further, here, as shown in FIG. 2, a space portion 17 is formed in order to position the secondary winding portion 19, and this space portion 17 is equivalent to at least one flat conductor wire in the secondary winding portion 19. It becomes a space having a thickness larger than the thickness of. Therefore, even when the intermediate connecting portion 11 forms the bent portion 16, the bending at the intermediate connecting portion 11 does not have to be a sharp bend such as a U shape or a V shape, and conforms to the L shape. Since it is possible to make it in a bent state, it is possible to suppress the deterioration of the film applied to the conductor due to bending, and the deterioration and progress of insulation caused by it.

  Furthermore, as shown in the cross-sectional view of FIG. 3, the intermediate connection portion 11 is more preferably located outside the region connecting the upper outer periphery and the lower outer periphery of the flange portion 22 of the closed magnetic path magnetic core 7, that is, outside the broken line A. desirable. As a result, the distance between the bent portion 16 and the secondary winding portion 19 where stress due to bending is easily applied can be increased, and the insulation between the secondary winding portion 19 and the intermediate connection portion 11 is more accurate. Is possible. Further, since the secondary winding portion 19 has a larger cross section than the primary winding portion 6, the inner peripheral sides of the secondary winding portion 19 and the primary winding portion 6 are respectively connected to the outer peripheral side of the middle magnetic leg 8. Therefore, the outer periphery of the secondary winding portion 19 is necessarily positioned outside the outer periphery of the primary winding portion 6. However, since the primary winding portion 6 or the secondary winding portion 19 is generally not arranged in a state of deviating outward from the flange portion 22, the intermediate connection portion 11 is moved away from the flange portion 22 having the above positional relationship. By disposing at the protruding position, it is possible to maintain a positional relationship in which the primary winding portion 6 and the secondary winding portion 19 are separated.

  Further, as the final shape of the transformer, since the resin sealing is performed by the exterior body 23, the intermediate connection portion 11 is not exposed from the exterior body, and the intermediate connection portion 11 is the flange portion 22 of the closed magnetic path magnetic core 7. It is desirable to maintain a positional relationship that is outside the region connecting the upper outer periphery and the lower outer periphery. And, by sealing the primary winding portion 6 and the secondary winding portion 19 with the exterior body 23, it is possible to prevent intrusion of dust, liquid, etc. from the outside, so that the insulation reliability is drastically improved. It can be done.

  At the same time, it is desirable to arrange a sheet-like or plate-like insulator 24 at a portion where the primary winding portion 6 and the secondary winding portion 19 face each other in order to improve insulation. The creepage distance can be increased by extending the portion up to the portion reaching the intermediate connection portion 11, which is more useful for improving the insulation.

  In the embodiment described above, the entire transformer is sealed with resin, but only the conductor portions such as the intermediate connection portion 11, the primary winding portion 6, and the secondary winding portion 19 are sealed with resin. Also, the effect of improving the insulation can be obtained by incorporating the closed magnetic path magnetic core 7 after forming as a molded coil. At the same time as this effect, only the conductor portion which is more resistant to twisting, expansion or contraction than the closed magnetic path magnetic core 7 is sealed with resin, or the number of joints is reduced inside the outer package 23. By doing so, it is possible to increase the degree of freedom in setting the thickness of the exterior body 23.

  In the configuration of FIG. 3, it is desirable that the closed magnetic path magnetic core 7 is a dust magnetic core (dust core) formed by fixing magnetic powder with a binding resin. The powder magnetic core (dust core) has a structure in which a large number of magnetic powders are fixed to each other with a resin, and a large number of fine magnetic gaps are formed around the magnetic powder, and cracks ( Even if a crack or the like occurs, it has a feature that there is little change in magnetic properties. From this, in the embodiment in which the closed magnetic path magnetic core 7 is resin-sealed, even if the stress generated by the exterior body 23 is applied to the closed magnetic path magnetic core 7, changes in magnetic properties can be suppressed, and various characteristics between individual products can be suppressed. It is possible to reduce variation in characteristics and deterioration.

  In addition, it is possible to reduce the number of man-hours by performing the sealing process of the entire device by the exterior body 23 at a time, and it is possible to increase the efficiency of productivity.

  This is because when a ferrite core is used as the closed magnetic circuit core 7, there is a possibility of causing a defect such as chipping or cracking due to stress applied to the ferrite core, or a change in magnetic properties due to this stress. As a countermeasure against this, the closed magnetic path magnetic core 7 is exposed after the closed magnetic path magnetic core 7 is incorporated after sealing only the primary winding portion 6 and the secondary winding portion 19. Alternatively, after closing only the primary winding portion 6 and the secondary winding portion 19 with resin, the closed magnetic path magnetic core 7 is incorporated, and then the primary winding portion 6 and the secondary winding portion 19 and the closed magnetic path magnetic core 7 are combined. In the assembled state, the whole is molded with a low-stress resin and a low-stress method so that the process is divided into two steps and covered with the resin, so that the closed magnetic path magnetic core 7 and the primary winding 6 and the secondary winding are covered. Simultaneously seal the winding part 19 Avoiding that is because it was common.

  Here, in order to obtain a larger number of turns on the primary side, as shown in the cross-sectional view of FIG. 4, the second primary winding portion 25 is disposed on the outer periphery of the primary winding portion 6, and the primary winding portion 6. And the second primary winding portion 25 may be connected in series. More specifically, first, as shown in the exploded perspective view of FIG. 5, the wide surface of the rectangular conductor wire is wound in a direction perpendicular to the axial direction of the middle leg portion 8 of the closed magnetic path magnetic core 7 serving as the winding axis. On the outer peripheral side of the first winding portion 9 and the second winding portion 10, a third winding portion 27 having one side third end portion 26 used as one electrode terminal and the other electrode terminal are used. A fourth winding portion 29 having one side fourth terminal portion 28 is disposed. Then, the first winding portion 9 and the second winding portion 10 are connected by the intermediate connection portion 11 of the conductor that is continuous to them, and the third winding portion 27 and the fourth winding portion 29 are the conductors that are continuous to them. The second intermediate connection part 30 is connected. At the same time, the direction of the magnetic flux generated by the current flowing through the first winding portion 9, the second winding portion 10, the third winding portion 27, and the fourth winding portion 29 is the same-action operation. As described above, the winding direction is defined after the first winding portion 9, the second winding portion 10, the third winding portion 27, and the fourth winding portion 29 are connected in series. In order to achieve this state, as shown in the exploded top view of FIG. 6, the primary winding portion 6 and the second primary winding portion 25 are connected to each other at the connection point 31 by welding or soldering inside the exterior body 23. Thus, a larger number of windings can be obtained.

  In this example, the connection point 31 is formed so as to connect the one-side second end 13 and the one-side fourth end 28, and the one-side first end 12 and the one-side third end 26 are input. Although it is a terminal or an output terminal, although not shown here, a connection point 31 is formed so as to connect the first end 12 on one side and the third end 26 on one side, and the second end on one side. 13 and the fourth end 28 on the one side may be input terminals or output terminals. Alternatively, the connection point side and the input terminal or output terminal side may be interchanged, and the primary winding portion 6 and the second primary winding portion 25 are connected in series, and the magnetic flux generated in each is summed. Any connection in the moving direction may be used.

  Thus, the connection point 31 is from the outer periphery of the composite winding part 32 including the secondary side, like the intermediate connection part 11 in the primary winding part 6 and the second intermediate connection part 30 in the second primary winding part 25. However, there are 4 conductors that are not coated like a connection point 31 between the primary winding portion 6 and the second primary winding portion 25 that form the primary side of the transformer. Since the flat conductor wire which is only one place with respect to one coil | winding and is another conductor is a state previously coat | covered, even when it is a case where the connection point 31 is formed inside the exterior body 23, the site | part The possibility of causing an electrical short circuit due to the can be very small.

  In addition, here, it is described on the assumption that one of the intermediate connection portions is not covered, but any one of the primary winding portion 6, the second primary winding portion 25, or the secondary winding portion 19 is described. Even if there are scratches or the like on the surface coating, it is needless to say that short-circuiting inside the exterior body 23 can be suppressed because the number of junction points that are exposed portions of the conductor portion is reduced. .

  As an example described above, the case where the connection point 31 is formed inside the exterior body 23 has been described. This connection point 31 is an electrode pattern (not shown) formed on the outer mounting surface (not shown) of the exterior body 23. You may form by connecting to (not shown). In this case, of course, there is no connection portion inside the transformer, and the connection point 31 can be formed with a sufficient volume outside the transformer, and the connection reliability can be improved. The connection point 31 may be formed on the one side second end 13 side by extending the one side fourth end portion 28, or the one side second end portion 13 may be extended by the one side fourth end portion. It may be formed on the 28 side. Further, when forming the primary winding part 6 and the second primary winding part 25, it is possible to improve the production efficiency by making the dimensions and dimensions as similar as possible. The connection point 31 may be formed after the end portion 13 and the first side fourth end portion 28 are stretched substantially uniformly.

  Further, the primary winding part 6 and the second primary winding part 25 constitute the primary winding part 6 or the second primary winding part 25 by being laminated not in the winding axis direction but in the circumferential direction. Since the opposing area between the flat conductor wire and the secondary winding portion 19 can be increased, the primary and secondary windings can be obtained even when the number of turns of the primary winding portion 6 and the second primary winding portion 25 is large. As a result, the power transmission loss can be reduced. This can suppress the heat generation of the transformer and maintain high conversion efficiency.

  Furthermore, in the conventional structure as shown in FIG. 9, the limit of the facing area between the primary winding 1 and the secondary winding 3 is limited by the limit value of the flatness ratio of the rectangular conductor wire to be used. As shown in FIG. 6, the primary side is divided into a plurality of windings and then laminated in the circumferential direction instead of the winding axis direction, thereby limiting the flatness of the rectangular conductor wire to be used. Disappears. As a result, it is possible to form a coil in which the primary winding portion 6 and the secondary winding portion 19 are made extremely thin and face each other, and a low-loss coil that further increases the degree of coupling between the primary side and the secondary side. Can be provided.

  Further, as shown in the sectional view of FIG. 7, the primary winding portion 6 and the second primary winding portion 25 are the primary winding portion on one surface side (the upper side in this figure) of the secondary winding portion 19. The second primary winding portion 25 is disposed on the outer periphery of the secondary winding portion 19, and the primary winding portion 6 is disposed on the outer periphery of the second primary winding portion 25 on the other side of the secondary winding portion 19 (the lower side in this figure). is doing.

  Accordingly, as shown in the top view of FIG. 8, the primary winding 6 before bending and the second primary winding 25 before bending can be applied as having the same shape, and productivity can be improved. It becomes.

  Further, since the primary winding portion 6 and the second primary winding portion 25 have the same shape, the primary winding in the state shown in FIG. 7 with the primary winding portion 6 and the second primary winding portion 25 connected in series. If all the directions of the magnetic flux generated in the line portion 6 and the second primary winding portion 25 are made to coincide with each other, it is possible to obtain an inductance value approximately twice as large as that in the case of either one alone. Alternatively, if the primary winding unit 6 and the second primary winding unit 25 are connected in parallel and the directions of the magnetic fluxes generated in the primary winding unit 6 and the second primary winding unit 25 are all matched, either one of them can be used alone. It is possible to obtain a substantially equivalent inductance value as compared to the case, and to obtain a current capacity in a conductor approximately twice that of either one alone, and use a conductor having a relatively small cross-sectional area. Even in this case, a large current can flow.

  Furthermore, in the configuration of FIG. 7, the connection between the primary winding portion 6 and the second primary winding portion 25 is used as a current flow path as an outer periphery (A), an inner periphery (B), an inner periphery (C), and an outer periphery. (D) In this order, the primary winding part is connected in series, and thus the primary winding part is wound around the closed magnetic path magnetic core 7 (d) corresponding to the high voltage part on the terminal side of the composite winding part 32 corresponding to the primary side. 6 and the second primary winding portion 25 are arranged on the outer peripheral side. Accordingly, the potential difference in the region where the composite winding portion 32 corresponding to the primary side and the closed magnetic path magnetic core 7 having substantially zero potential are close to each other is suppressed to a low level, and a safety structure coil with further improved insulation performance inside the transformer is provided. It is also something that can be done.

  In the above-described embodiment, the transformer is used as an example to explain that the primary side and the secondary side exist. However, the choke coil is composed of a plurality of windings, and any one of them is used as a control winding. It may be applicable to inductor parts in general and need not be limited to a transformer. In the above embodiment, for convenience, the description is made after classification as the primary side and the secondary side. However, there is no problem even if the primary side and the secondary side are interchanged.

  The transformer of the present invention has an effect of maintaining high reliability and is useful when applied to various electronic devices.

6 Primary winding portion 7 Closed magnetic path magnetic core 8 Middle leg portion 9 First winding portion 10 Second winding portion 11 Intermediate connection portion 12 One side first end portion 13 One side second end portion 14 First air core portion 15 First portion 2 air core part 16 bending part 17 space part 18 secondary side air core part 19 secondary winding part 20 other side first end part 21 other side second end part 22 collar part 23 exterior body 24 insulator 25 second primary winding Part 26 One-side third end 27 Third winding part 28 One-side fourth end 29 Fourth winding part 30 Second intermediate connection part 31 Connection point 32 Composite winding part

Claims (6)

Using a first flat conductor wire having an insulating coating on the surface,
A first winding portion having a first air core portion wound with its wide surface perpendicular to the winding axis, and a second winding portion having a second air core portion;
An intermediate connection portion connecting the first winding portion and the second winding portion;
One side first end drawn from the first winding portion;
A winding body composed of a second end portion on one side drawn out from the second winding portion,
After bending the intermediate connection portion to form a bent portion and forming the space portion between the first winding portion and the second winding portion to face each other,
One side winding part formed so as to arrange the first air core part and the second air core part coaxially;
The other side winding portion having the other side first end portion, the other side second end portion and the other side air core portion;
A closed magnetic circuit core having a magnetic leg portion,
Placing the other side air core in the space,
Passing the magnetic leg portion through the first air core portion, the second air core portion and the other air core portion;
The one side first end and the one side second end and the other side first end and the other side second end are used as input / output terminals,
An inductor component in which the intermediate connection portion is positioned outside the one side winding portion and the other side winding portion. The other winding portion has a cross-sectional area larger than that of the first rectangular conductor wire, and a second rectangular conductor wire having an insulating coating on the surface thereof is used. The wide surface of the winding portion is perpendicular to the winding axis. The inductor component according to claim 1, which is wound as described above. Using a first flat conductor wire having an insulating coating on the surface,
A first winding portion having a first air core portion wound with its wide surface perpendicular to the winding axis, and a second winding portion having a second air core portion;
A first intermediate connecting portion for connecting the first winding portion and the second winding portion;
One side first end drawn from the first winding portion;
A winding body composed of a second end portion on one side drawn out from the second winding portion,
After bending the first intermediate connection portion to form a bent portion and forming a space portion between the first winding portion and the second winding portion to face each other,
A first one-side winding portion formed so as to arrange the first air core portion and the second air core portion coaxially;
Using a first flat conductor wire having an insulating coating on the surface,
The third winding wound around the outer circumference of the first winding and the fourth winding wound around the outer circumference of the second winding with the wide surface wound perpendicularly to the winding axis. The line section,
A second intermediate connecting portion connecting the third winding portion and the fourth winding portion;
A third end portion on one side drawn out from the third winding portion;
A winding body composed of a fourth end portion on one side drawn out from the fourth winding portion,
A second one-side winding portion in which an intermediate bent portion is formed by bending the second intermediate connection portion and the third winding portion and the fourth winding portion are opposed to each other;
The other side winding portion having the other side first end portion, the other side second end portion and the air core portion;
A closed magnetic circuit core having a magnetic leg portion,
An air core part of the other side winding part is arranged in the space part,
Passing the magnetic leg part through the first air core part, the second air core part, and the air core part of the other side winding part;
The second end and the third end are electrically connected to connect the first end, the fourth end, the other side first end, and the other side second end to an input / output terminal. age,
An inductor component in which the intermediate connection portion and the second intermediate connection portion are positioned outside the first one-side winding portion, the second one-side winding portion, and the other-side winding portion. The other winding portion has a cross-sectional area larger than that of the first rectangular conductor wire, and a second rectangular conductor wire having an insulating coating on the surface thereof is used. The wide surface of the winding portion is perpendicular to the winding axis. The inductor component according to claim 3, which is wound as described above. Using a first flat conductor wire having an insulating coating on the surface,
A first winding portion having a first air core portion wound with its wide surface perpendicular to the winding axis, and a second winding portion having a second air core portion;
A first intermediate connecting portion for connecting the first winding portion and the second winding portion;
One side first end drawn from the first winding portion;
A winding body composed of a second end portion on one side drawn out from the second winding portion,
After forming the intermediate bent portion by bending the first intermediate connection portion, and forming the space portion between the first winding portion and the second winding portion to face each other,
A first one-side winding portion formed so as to arrange the first air core portion and the second air core portion coaxially;
Using a first flat conductor wire having an insulating coating on the surface,
A third winding wound around the outer circumference of the first winding wound with the wide surface perpendicular to the winding axis, and a fourth wound around the inner circumference of the second winding. Winding part,
A second intermediate connecting portion connecting the third winding portion and the fourth winding portion;
A third end portion on one side drawn out from the third winding portion;
A winding body composed of a fourth end portion on one side drawn out from the fourth winding portion,
A second one-side winding portion in which a bent portion is formed by bending the second intermediate connection portion and the third winding portion and the fourth winding portion are opposed to each other;
The other side winding portion having the other side first end portion, the other side second end portion and the air core portion;
A closed magnetic circuit core having a magnetic leg portion,
An air core part of the other side winding part is arranged in the space part,
Passing the magnetic leg part through the first air core part, the second air core part, and the air core part of the other side winding part;
The second end and the third end are electrically connected to connect the first end, the fourth end, the other side first end, and the other side second end to an input / output terminal. age,
An inductor component in which the intermediate connection portion and the second intermediate connection portion are positioned outside the first one-side winding portion, the second one-side winding portion, and the other-side winding portion. The other winding portion has a cross-sectional area larger than that of the first rectangular conductor wire, and a second rectangular conductor wire having an insulating coating on the surface thereof is used. The wide surface of the winding portion is perpendicular to the winding axis. The inductor component according to claim 5, which is wound as described above.

Images