JP2019102699A - Coil component - Google Patents

Abstract

To reduce difference of DC resistance and AC resistance, while reducing inner and outer boundary difference of the conductor portion.SOLUTION: A coil component includes a first coil part 100 including conductor portions A1-A6 arranged, in this order, from the outer peripheral side to the inner peripheral side, and a second coil part 200 including conductor portions B1-B6 arranged, in this order, from the outer peripheral side to the inner peripheral side. Inner peripheral ends of the conductor portions A1-A6 are connected, respectively, to the inner peripheral ends of the conductor portions B3, B2, B1, B6, B5, B4. With such an arrangement, inner and outer boundary difference of the conductor portions is reduced. Furthermore, impact of magnetic field is made uniform furthermore, because interconnection of the conductor portions, locally increasing AC resistance by impact of the magnetic field, is avoided. Since AC resistance is reduced, difference of the DC resistance and the AC resistance can be reduced.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a coil component, and more particularly to a coil component having a spiral flat conductor.

  As a coil component used for various electronic devices, in addition to a coil component of a type in which a wire (coated wire) is wound around a magnetic core, a type in which a spiral planar conductor is formed over a plurality of turns on the surface of an insulating substrate Coil components are known. For example, Patent Document 1 discloses a configuration in which a spiral flat conductor is formed on the surface of an insulating substrate, and the flat conductor is divided into three in the radial direction by a spiral slit. As described above, when the planar conductor is divided in the radial direction by the spiral slit, the deviation of the current density is reduced, and therefore, the direct current resistance and the alternating current resistance can be reduced. However, in the flat conductor of Patent Document 1, a large difference occurs between the electrical lengths of the conductor portion located on the inner peripheral side and the conductor portion located on the outer peripheral side, which causes a problem that the AC resistance increases.

  On the other hand, although a plane conductor is not used, FIG. 8 of Patent Document 2 discloses a configuration in which the positions in the radial direction of four planarly wound conductive wires are appropriately interchanged. If such replacement is performed, the difference between the inner and outer peripheries is cancelled, so that the electrical lengths of the respective conductive lines can be made uniform.

JP-A-8-203739 Patent No. 4752879

  However, in a coil component of the type in which spiral flat conductors are formed on the front and back of the insulating substrate, only two planar conductors can be used, so the layout described in FIG. 8 of Patent Document 2 can not be realized. . For example, the radial positions of the conductive wire 41 and the conductive wire 44 are switched at the switching position 45 described in FIG. 8 of Patent Document 2, but at the switching position 45, the conductive wire 41 and the conductive wire 44 intersect. Therefore, when a flat conductor is used, it is impossible to pass the remaining conductive wires 42 and 43 at this intersection.

  In addition, among the spiral-shaped planar conductors, the planar conductor located on the innermost side and the planar conductor located on the outermost side are exposed to a stronger magnetic field than other planar conductors, so AC resistance is localized. Tend to be higher. For this reason, there is a problem that the planar conductor positioned on the innermost side and the planar conductor positioned on the outermost side have much higher alternating current resistance than the direct current resistance.

  Therefore, in the coil component including a plurality of spiral flat conductors, the present invention reduces the difference between the inner and outer peripheries of the conductor portions while dividing the flat conductor in the radial direction by the spiral slits, and DC resistance and AC resistance To reduce the difference in

  A coil component according to the present invention comprises a first coil portion spirally wound over a plurality of turns, and a second coil portion spirally wound over a plurality of turns, The coil portion includes four or more conductor portions radially separated by a spiral slit, and the second coil portion includes four or more conductor portions radially separated by a spiral slit, Of the four or more conductor portions constituting the first coil portion, the inner circumferential end of the conductor portion located on the innermost side is the innermost portion of the four or more conductor portions constituting the second coil portion. Among the four or more conductor parts constituting the first coil part, the conductor part located on the side and the conductor part located on the outermost side are connected to the inner peripheral end of a predetermined conductor part different from the conductor part located on the outermost side. The inner circumferential end of the conductor portion located is Among the four or more conductor parts constituting the coil part, the conductor part located at the innermost circumference side, the conductor part located at the outermost circumference side, and the inner circumference end of another conductor part different from the predetermined conductor part are connected It is characterized by

  According to the present invention, of the four or more conductor portions constituting the first coil portion, the conductor portion positioned on the innermost side is the most of the four or more conductor portions constituting the second coil portion. The difference between the inner and outer peripheries of the conductor portions is reduced by connecting to the conductor portions other than the conductor portions located on the inner peripheral side. Moreover, among the four or more conductor portions constituting the first coil portion, the conductor portion located on the innermost circumferential side is positioned on the outermost periphery among the four or more conductor portions constituting the second coil portion. It is also possible to avoid the connection between the conductor portions where the alternating current resistance is locally increased due to the influence of the magnetic field, since the connection is made to the conductor portion which is not the conductor portion to be connected.

  In the present invention, the four or more conductor portions constituting the first coil portion include the first to sixth conductor portions in order from the outer peripheral side, and the four or more conductor portions constituting the second coil portion are: The first conductor portion of the first coil portion is connected to one of the third and fourth conductor portions of the second coil portion in order from the outer peripheral side, including the first to sixth conductor portions. The sixth conductor portion of the first coil portion is connected to the other of the third and fourth conductor portions of the second coil portion, and the first conductor portion of the second coil portion is connected to the first coil portion The sixth conductor portion of the second coil portion may be connected to one of the third and fourth conductor portions of the second coil portion and the other of the third and fourth conductor portions of the first coil portion. Absent. According to this, since the first and second coil portions are divided into at least six, the deviation of the current density is effectively reduced. This makes it possible to further reduce the direct current resistance and the alternating current resistance.

  In the present invention, the second conductor portion of the first coil portion is connected to the second conductor portion of the second coil portion, and the fifth conductor portion of the first coil portion is the second coil portion. It may be connected to the fifth conductor portion of According to this, when the first and second coil portions are divided into at least six, it is possible to further reduce the difference between the inner and outer peripheries of the conductor portions.

  In the present invention, the four or more conductor portions constituting the first coil portion include the first to fourth conductor portions in order from the outer peripheral side, and the four or more conductor portions constituting the second coil portion are The first conductor portion of the first coil portion is connected to one of the second and third conductor portions of the second coil portion in order from the outer peripheral side, including the first to fourth conductor portions. The fourth conductor portion of the first coil portion is connected to the other of the second and third conductor portions of the second coil portion, and the first conductor portion of the second coil portion is connected to the first coil portion. The fourth conductor portion of the second coil portion may be connected to one of the second and third conductor portions of the second coil portion and the other of the second and third conductor portions of the first coil portion. Absent. According to this, since the first and second coil portions are divided into at least four, the deviation of the current density is effectively reduced. This makes it possible to further reduce the direct current resistance and the alternating current resistance.

  In the present invention, the outer peripheral end of the first coil portion and the outer peripheral end of the second coil portion are provided at positions adjacent to each other in plan view, and each of the plurality of turns constituting the first and second coil portions is A circumferential region in which the position in the radial direction does not change and a transition region in which the position in the radial direction transitions, the transition region radially extending from the center point of the first and second coils; It may be located on an imaginary line passing between the outer peripheral end of the coil portion and the outer peripheral end of the second coil portion. According to this, it is possible to make the outer peripheral end of the first coil portion adjacent to the outer peripheral end of the second coil portion while preventing the enlargement of the outer shape.

  In the present invention, the inner peripheral ends of the first and second coil portions may be located in the transition region. According to this, it is possible to minimize the decrease in the inner diameter area of the coil.

  In the present invention, the pattern shape of the first coil portion and the pattern shape of the second coil portion may be the same. According to this, it is possible to manufacture the first coil portion and the second coil portion using the same mask.

  In the present invention, the first coil portion may be formed on one surface of the insulating substrate, and the second coil portion may be formed on the other surface of the insulating substrate. According to this, by forming the first and second coil portions on the front and back of a single insulating substrate, it is possible to manufacture a coil component according to the present invention. Moreover, even if the insulating substrate is transparent or semitransparent, the appearance inspection becomes easy if most of the first coil portion and the second coil portion overlap.

  As described above, according to the present invention, it is possible to reduce the difference between the inner and outer peripheries of the plurality of radially divided conductor portions and to reduce the difference between the direct current resistance and the alternating current resistance. As a result, it is possible to provide a coil component with less heat generation, which is excellent in direct current resistance and alternating current resistance.

FIG. 1 is a cross-sectional view showing the configuration of a coil component according to an embodiment of the present invention. FIG. 2 is a plan view for explaining the pattern shape of the first coil portion 100, and shows a state as viewed from the one surface 11 side of the insulating substrate 10. As shown in FIG. FIG. 3 is an equivalent circuit diagram of the first coil unit 100. As shown in FIG. FIG. 4 is a plan view for explaining the pattern shape of the second coil portion 200, and shows a state viewed from the other surface 12 side of the insulating substrate 10. As shown in FIG. FIG. 5 is an equivalent circuit diagram of the second coil unit 200. As shown in FIG. FIG. 6 is an equivalent circuit diagram of a coil component according to an embodiment of the present invention. FIG. 7 is a schematic view showing a magnetic flux φ generated when current flows through the coil component. FIG. 8 is a schematic view for explaining the relationship between the length of the conductor portion and the magnetic field strength. FIG. 9 is an equivalent circuit diagram for explaining the connection relationship of coil parts according to the first modification. FIG. 10 is an equivalent circuit diagram for explaining the connection relationship of coil parts according to the second modification. FIG. 11 is an equivalent circuit diagram for explaining the connection relationship of coil parts according to the third modification. FIG. 12 is an equivalent circuit diagram for explaining the connection relationship of coil parts according to the fourth modification. FIG. 13 is an equivalent circuit diagram for explaining the connection relationship of coil parts according to the fifth modification. FIG. 14 is an equivalent circuit diagram for explaining the connection relationship of coil components according to the sixth modification.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a cross-sectional view showing the configuration of a coil component according to an embodiment of the present invention.

  As shown in FIG. 1, the coil component according to the present embodiment is formed on an insulating substrate 10, a first coil portion 100 formed on one surface 11 of the insulating substrate 10, and the other surface 12 of the insulating substrate 10. And the second coil unit 200. Although the details will be described later, the inner peripheral end of the first coil portion 100 and the inner peripheral end of the second coil portion 200 are connected through the plurality of connection portions TH1 to TH6 provided through the insulating substrate 10. Connected to each other.

  The material of the insulating substrate 10 is not particularly limited, but a transparent or translucent flexible material such as PET resin can be used. Further, the insulating substrate 10 may be a flexible substrate in which glass cloth is impregnated with an epoxy resin. When the insulating substrate 10 is transparent or translucent, the first coil portion 100 and the second coil portion 200 appear to overlap in a plan view, so it is difficult to perform an appearance inspection using an inspection device depending on how these overlap. It becomes. Although the details will be described later, in the coil component according to the present embodiment, most of the first coil unit 100 and the second coil unit 200 overlap in plan view so that the appearance inspection using the inspection apparatus can be correctly performed. Is located in

  FIG. 2 is a plan view for explaining the pattern shape of the first coil portion 100, and shows a state as viewed from the one surface 11 side of the insulating substrate 10. As shown in FIG.

  As shown in FIG. 2, the first coil portion 100 is formed of a flat conductor spirally wound over a plurality of turns. In the example shown in FIG. 2, the first coil portion 100 has a six-turn configuration including turns 110 to 160, the turn 110 is positioned at the outermost periphery, and the turn 160 is positioned at the innermost periphery. Each turn 110 to 160 is divided into six in the radial direction by five spiral slits. Thus, the turns 110 to 160 are the conductor portions 111 to 161 located on the outermost side, the conductor portions 112 to 162 located on the second side on the outer side, and the conductor portions 113 to 163 located on the third side on the outer side. , And the conductor portions 114 to 164 positioned fourth on the outer circumferential side, the conductor portions 115 to 165 positioned fifth on the outer circumferential side, and the conductor portions 116 to 166 positioned innermost.

  The conductor portions 111 to 116 of the turns 110 located at the outermost periphery are connected to the terminal electrode E1a via the radially extending lead patterns 191. In addition, a radially extending lead pattern 192 is provided at a position adjacent to the lead pattern 191 in the circumferential direction, and the tip thereof is connected to the terminal electrode E2b. On the other hand, the inner peripheral ends of the conductor portions 161 to 166 of the turn 160 located on the innermost periphery are connected to the connection portions TH1 to TH6, respectively.

  Thus, as shown in FIG. 3, the conductor portions 111 to 161 located on the outermost side constitute a conductor portion A1 connected in series between the terminal electrode E1a and the connection portion TH1, and the second outer periphery The conductor portions 112 to 162 located on the side constitute a conductor portion A2 connected in series between the terminal electrode E1a and the connection portion TH2, and the conductor portions 113 to 163 located on the third outer peripheral side are terminals Conductor portion A3 connected in series between electrode E1a and connection portion TH3 and the conductor portions 114 to 164 located at the fourth outer peripheral side are in series between terminal electrode E1a and connection portion TH4. The conductor portions 115 to 165 that form the connected conductor portion A4 and are fifthly on the outer peripheral side constitute the conductor portion A5 connected in series between the terminal electrode E1a and the connection portion TH5, and Located on the circumferential side Body portion 116 to 166 constitute the conductive portion A6 connected in series between the connection portion TH6 a terminal electrode E1a.

  Each of the turns 110 to 160 constituting the first coil portion 100 has a circumferential region 100a whose position in the radial direction does not change, and a transition region 100b whose position in the radial direction changes. Six turns consisting of turn 110 to turn 160 are defined as boundaries. As shown in FIG. 2, in the present embodiment, both the outer peripheral end and the inner peripheral end of the first coil portion 100 are located in the transition region 100 b. Furthermore, when an imaginary line L0 extending radially from the center point C of the first coil portion 100 and passing between the lead-out pattern 191 and the lead-out pattern 192 is drawn, the transition region 100b is located on the imaginary line L0. ing. The connection portion TH1 and the connection portion TH3 are disposed at positions symmetrical to each other about the virtual line L0, and the connection portion TH4 and the connection portion TH6 are disposed at positions symmetrical to each other about the virtual line L0. There is. Further, the connection portion TH2 and the connection portion TH5 are disposed on the virtual line L0.

  FIG. 4 is a plan view for explaining the pattern shape of the second coil portion 200, and shows a state viewed from the other surface 12 side of the insulating substrate 10. As shown in FIG.

  As shown in FIG. 4, the pattern shape of the second coil unit 200 is the same as the pattern shape of the first coil unit 100. Therefore, the first coil unit 100 and the second coil unit 200 can be manufactured using the same mask, which makes it possible to significantly reduce the manufacturing cost. The second coil portion 200 has a six-turn configuration of turns 210 to 260, with the turn 210 located at the outermost periphery and the turn 260 located at the innermost periphery. Each turn 210 to 260 is divided into six in the radial direction by five spiral slits. Thus, the turns 210 to 260 are the conductor portions 211 to 261 located on the outermost side, the conductor portions 212 to 262 located on the second side on the outer side, and the conductor portions 213 to 263 located on the third side on the outer side. , And the conductor portions 214 to 264 positioned fourth on the outer circumferential side, the conductor portions 215 to 265 positioned fifth on the outer circumferential side, and the conductor portions 216 to 266 positioned innermost.

  The conductor portions 211 to 216 of the turns 210 located at the outermost periphery are connected to the terminal electrode E2a via the radially extending lead patterns 292. In addition, a radially extending lead pattern 291 is provided at a position adjacent to the lead pattern 292 in the circumferential direction, and the tip end thereof is connected to the terminal electrode E1 b. The lead-out pattern 291 is connected to the lead-out pattern 191 shown in FIG. 2 via the connection portion THa. Thus, the terminal electrodes E1a and E1b are shorted. Similarly, the lead-out pattern 292 is connected to the lead-out pattern 192 shown in FIG. 2 via the connection portion THb. Thus, the terminal electrodes E2a and E2b are shorted. In the present embodiment, two connection portions THa and THb are respectively provided, but the number of the connection portions is not particularly limited. On the other hand, the inner peripheral ends of the conductor portions 261 to 266 of the turn 260 located on the innermost periphery are connected to the connection portions TH3, TH2, TH1, TH6, TH5, and TH4, respectively.

  Thereby, as shown in FIG. 5, the conductor portions 211 to 261 located on the outermost side constitute a conductor portion B1 connected in series between the terminal electrode E2a and the connection portion TH3, and the second outer periphery The conductor portions 212 to 262 located on the side constitute a conductor portion B2 connected in series between the terminal electrode E2a and the connection portion TH2, and the conductor portions 213 to 263 located on the third outer peripheral side are terminals Conductor portion B3 connected in series between electrode E2a and connection portion TH1 and conductor portions 214 to 264 located on the fourth outer peripheral side are in series between terminal electrode E2a and connection portion TH6 The conductor portions 215 to 265 that form the connected conductor portion B4 and fifthly located on the outer peripheral side constitute the conductor portion B5 connected in series between the terminal electrode E2a and the connection portion TH5, and Located on the circumferential side Body portion 216 to 266 constitutes the conductive portions B6, which are connected in series between the connection portion TH4 and the terminal electrodes E2a.

  Each of the turns 210 to 260 constituting the second coil portion 200 has a circumferential area 200 a whose position in the radial direction does not change and a transition area 200 b where the position in the radial direction changes. Since the first coil portion 100 and the second coil portion 200 have the same planar shape, the imaginary line L 0 is at the outer peripheral end of the first coil portion 100 and at the outer peripheral end of the second coil portion 200. I will pass between.

  In the first coil unit 100 and the second coil unit 200 having such a configuration, their central points C coincide with each other, and the terminal electrodes E1a and E1b overlap, and the terminal electrodes E2a and E2b overlap so as to overlap. It is formed on the front and back of the substrate 10. As a result, the circumferential region 100a of the turns 110 to 160 of the first coil portion 100 and the circumferential region 200a of the turns 210 to 260 of the second coil portion 200 are mostly overlapped in plan view . The inner peripheral ends of the conductor portions A1 to A6 constituting the first coil portion 100 are conductor portions B3, B2, B1, B6, and the like constituting the second coil portion 200 through the connection portions TH1 to TH6. It is connected to the inner peripheral end of B5 and B4.

  As a result, the first coil unit 100 and the second coil unit 200 are connected in series as shown in FIG. 6, and a total of 12 turns of spiral coils are configured. The terminal electrode E1 shown in FIG. 6 indicates the shorted terminal electrodes E1a and E1b, and the terminal electrode E2 indicates the shorted terminal electrodes E2a and E2b. Then, as shown in FIG. 6, the conductor portion A1 is connected to the conductor portion B3 through the connection portion TH1, the conductor portion A2 is connected to the conductor portion B2 through the connection portion TH2, and the conductor portion A3 is the connection portion TH3. The conductor portion A4 is connected to the conductor portion B6 through the connection portion TH4, the conductor portion A5 is connected to the conductor portion B5 through the connection portion TH5, and the conductor portion A6 is the connection portion It is connected to the conductor portion B4 via the TH6.

  As described above, in the coil component according to the present embodiment, since each turn is divided into six in the radial direction by the spiral slit, the deviation of the current density is reduced as compared to the case where such a slit is not provided. Ru. As a result, direct current resistance and alternating current resistance can be reduced. Moreover, since the radial positions of the conductor portions are interchanged between the first coil portion 100 and the second coil portion 200, the difference between the inner and outer circumferences is reduced.

  For example, conductor portion A1 and conductor portion B1 have the same length, conductor portion A3 and conductor portion B3 have the same length, and conductor portions A1 and B1 are longer than conductor portions A3 and B3. It is long. However, in the present embodiment, since the conductor portion A1 and the conductor portion B3 are connected, and the conductor portion A3 and the conductor portion B1 are connected, the total length of both matches completely. This length is substantially equal to the total length of the conductor portion A2 and the conductor portion B2. Similarly, conductor portion A4 and conductor portion B4 have the same length, conductor portion A6 and conductor portion B6 have the same length, and conductor portions A4 and B4 are more than conductor portions A6 and B6. The length is long. However, since the conductor portion A4 and the conductor portion B6 are connected, and the conductor portion A6 and the conductor portion B4 are connected, the total length of both matches completely. This length is substantially equal to the total length of the conductor portion A5 and the conductor portion B6. As a result, since the difference between the inner and outer circumferences is alleviated, it is possible to further reduce DC resistance and AC resistance.

  Further, when current flows in the coil component according to the present embodiment, a magnetic flux φ is generated as shown in FIG. The magnetic flux φ passes through the inner diameter area of the first and second coil sections 100 and 200 and passes outside the first and second coil sections 100 and 200. Therefore, the magnetic field becomes stronger in the portion closer to the innermost turn of the first and second coil portions 100 and 200 and the portion closer to the outermost peripheral turn of the first and second coil portions 100 and 200. , AC resistance tends to increase locally.

  FIG. 8 is a schematic view for explaining the relationship between the length of the conductor portion and the magnetic field strength.

  As shown in FIG. 8, focusing on the conductor portions 111 to 116 constituting the turn 110, the conductor portion 111 is located on the outermost side, and the conductor portion 116 is located on the innermost side. For this reason, as shown by the arrow L, the conductor portions 111 to 116 are the longest in the conductor portion 111 and the shortest in the conductor portion 116. Similarly, focusing on the conductor portions 161 to 166 constituting the turn 160, the conductor portion 161 is located on the outermost side, and the conductor portion 166 is located on the innermost side. Therefore, as shown by the arrow L, the conductor portions 161 to 166 have the longest conductor portion 161 and the shortest conductor portion 166. In short, the conductor portion A1 is the longest and the conductor portion A6 is the shortest. The above-mentioned point is the same as in the second coil portion 200, and the conductor portion B1 is the longest and the conductor portion B6 is the shortest.

  On the other hand, with regard to the magnetic field, as described above, the portion closer to the innermost turn or the portion closer to the outermost turn becomes stronger. Therefore, in the turn 110 located at the outermost periphery, as shown by the arrow F, the magnetic field is strongest at the conductor portion 111 located at the outer peripheral side, and the magnetic field is weakest at the conductor portion 116 located at the inner peripheral side. Conversely, in the turn 160 located at the innermost periphery, as shown by the arrow F, the magnetic field is strongest at the conductor portion 166 located at the inner periphery, and the magnetic field is weakest at the conductor portion 161 located at the outer periphery . The above points are the same in the second coil portion 200. In the turn 210 located at the outermost periphery, as shown by the arrow F, the magnetic field is strongest at the conductor portion 211 located at the outer periphery, and the inner periphery The magnetic field is weakest at the conductor portion 216 located on the side. Conversely, in the turn 260 located at the innermost periphery, as shown by the arrow F, the magnetic field is strongest at the conductor portion 266 located at the inner periphery, and the magnetic field is weakest at the conductor portion 261 located at the outer periphery .

  For this reason, when the first coil portion 100 and the second coil portion 200 are connected in a combination in which the difference in inner and outer circumferences is minimized, conductor portions strongly affected by the magnetic field are connected to each other, thereby increasing AC resistance. It will That is, in order to minimize the difference between the inner and outer circumferences, the conductor portion A1 located at the outermost periphery and the conductor portion B6 located at the innermost periphery are connected, and the conductor portion A6 located at the innermost periphery is located at the outermost periphery The conductor portion B1 may be connected. In this case, the conductor portion 111 having the strongest magnetic field is connected at the turn 110, and the conductor portion 266 having the strongest magnetic field is connected at the turn 260. It gets higher. Similarly, since the conductor portion 166 having the strongest magnetic field is connected at the turn 160 and the conductor portion 211 having the strongest magnetic field at the turn 210, the AC resistance in the combination is significantly increased.

  Taking this point into consideration, in the present embodiment, the conductor portion A1 located at the outermost periphery and the conductor portion B6 located at the innermost periphery are not connected, but the conductor portion A1 located at the outermost periphery and the position located at the outermost periphery By connecting the conductor portions other than the conductor portion B1 and the conductor portion B6 located at the innermost circumference (that is, any of B2 to B5), while reducing the difference between the inner and outer circumferences, the combination strongly affected by the magnetic field I'm avoiding. As a result, there is no combination in which AC resistance is specifically increased, and the influence of the magnetic field is made more uniform. As a result, AC resistance is reduced, and the difference between DC resistance and AC resistance can be reduced. Become.

  Moreover, in the coil component according to the present embodiment, except for the transition regions 100b and 200b, most of the first coil portion 100 and the second coil portion 200 overlap in plan view, so the insulating substrate 10 is transparent or translucent. Even if this is the case, visual interference between the first coil unit 100 and the second coil unit 200 can be minimized. That is, the second coil unit 200 does not become a visual obstacle when the first coil unit 100 is subjected to an appearance inspection, and conversely, the first coil unit 100 is used when the second coil unit 200 is subjected to an appearance inspection. There is no visual obstacle. This makes it possible to correctly execute the appearance inspection using the inspection apparatus.

  Furthermore, in the coil component according to the present embodiment, since the outer peripheral end and the inner peripheral end of the first and second coil portions 100 and 200 are arranged in the transition region 100 b and 200 b, the outer periphery of the first coil portion 100 Although the end and the outer peripheral end of the second coil portion 200 are arranged adjacent to each other, the increase of the outer shape of the coil portion due to the increase of the circumferential regions 100a and 200a and the decrease of the inner diameter region of the coil It is also possible to prevent

  Hereinafter, some modifications of the present embodiment will be described.

  FIG. 9 is an equivalent circuit diagram for explaining the connection relationship of coil parts according to the first modification. In the example shown in FIG. 9, the conductor portions A1 to A6 are connected to the conductor portions B4, B2, B6, B1, B5 and B3, respectively. Also in such a connection method, it is possible to avoid the combination that is strongly influenced by the magnetic field while alleviating the difference between the inner and outer circumferences. As in the example shown in FIGS. 6 and 9, the conductor portion A1 is connected to one of the conductor portions B3 and B4, the conductor portion A6 is connected to the other of the conductor portions B3 and B4, and the conductor portion B1 is connected to the conductor portion A3 and By connecting to one of A4 and connecting the conductor part B6 to the other of the conductor parts A3 and A4, it is possible to effectively prevent an increase in AC resistance due to the influence of a magnetic field while effectively reducing the inner and outer peripheral difference. It becomes possible.

  FIG. 10 is an equivalent circuit diagram for explaining the connection relationship of coil parts according to the second modification. In the example shown in FIG. 10, the conductor portions A1 to A6 are connected to the conductor portions B5, B6, B4, B3, B1 and B2, respectively. This connection method is suitable when priority is given to alleviating the difference between the inner and outer circumferences.

  FIG. 11 is an equivalent circuit diagram for explaining the connection relationship of coil parts according to the third modification. In the example shown in FIG. 11, the conductor portions A1 to A6 are connected to the conductor portions B2, B1, B4, B3, B6, and B5, respectively. This connection method is suitable when priority is given to preventing the increase in AC resistance due to the influence of a magnetic field.

  In the above-described embodiment and its modification, each turn constituting the first and second coil sections 100 and 200 is radially divided into six, but the number of division is not particularly limited as long as it is four or more. This is because the current density distribution becomes more uniform as the number of divisions increases. However, when the number of divisions increases, the area occupied by the slits increases accordingly, so the conductor area per turn tends to decrease and the direct current resistance tends to increase. In consideration of this point, it is preferable to set the division number to 4 to 8. The actual number of divisions may be determined according to the frequency of the current flowing through the coil component, the amount of heat generation that is allowed, etc. Is preferred. In particular, when the coil component according to the present invention is used as a power transmission coil of a wireless power transmission system, the frequency of AC power to be transmitted is 30 to 150 kHz, and in this case, the division number of 6 is optimum. On the other hand, when using it as a receiving coil of a wireless power transmission system, since the calorific value is small compared with a power transmission coil, division number 4 is optimal.

  FIG. 12 is an equivalent circuit diagram for explaining the connection relationship of coil parts according to the fourth modification. In the example shown in FIG. 12, the division number of each turn constituting the first and second coil sections 100 and 200 is four, and the first coil section 100 is constituted of conductor portions A1 to A4, and the second The coil portion 200 is composed of the conductor portions B1 to B4. And in this example, conductor parts A1 to A4 are connected to conductor parts B2, B1, B4, and B3, respectively. This connection method is suitable when the division number of each turn is four and priority is given to preventing the increase in AC resistance due to the influence of the magnetic field.

  FIG. 13 is an equivalent circuit diagram for explaining the connection relationship of coil parts according to the fifth modification. In the example shown in FIG. 13, the division number of each turn constituting the first and second coil units 100 and 200 is four, and the conductor portions A1 to A4 are connected to the conductor portions B3, B4, B1 and B2, respectively. ing. This connection method is suitable when the division number of each turn is four and priority is given to alleviating the difference between the inner and outer circumferences.

  FIG. 14 is an equivalent circuit diagram for explaining the connection relationship of coil components according to the sixth modification. In the example shown in FIG. 14, the division number of each turn constituting the first and second coil sections 100 and 200 is eight, and the first coil section 100 is constituted of conductor portions A1 to A8, and the second The coil portion 200 is composed of conductor portions B1 to B8. And in this example, conductor parts A1 and A2 are short-circuited and connected in common to conductor parts B3 and B4, conductor parts A3 and A4 are shorted and connected in common to conductor parts B1 and B2, conductor part A5, A6 is short-circuited and commonly connected to the conductor portions B7 and B8, and the conductor portions A7 and A8 are short-circuited and commonly connected to the conductor portions B5 and B6. As the present example illustrates, in the present invention, a part of the plurality of conductor portions constituting the first coil portion 100 is short-circuited, and a portion of the plurality of conductor portions constituting the second coil portion 200 is You may short circuit. According to this, it is possible to reduce the number of connections. Alternatively, in the case of maintaining the number of connections, two connections can be assigned to the same conductor pattern, so that the reliability can be improved.

  Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention. It is needless to say that they are included in the scope.

  For example, although two coil parts are formed on the front and back of the insulating substrate in the above embodiment, this point is not essential in the present invention. Moreover, in each said embodiment, although the pattern shape of two coil parts is mutually identical, this point is not also essential in this invention.

  Moreover, in the said embodiment, although each turn which comprises the 1st and 2nd coil parts 100 and 200 is all separated in the radial direction by the spiral slit, all the turns are diameter by the spiral slit. It does not have to be separated in direction.

DESCRIPTION OF SYMBOLS 10 Insulating substrate 11 One surface 12 of an insulating substrate The other surface 100 of an insulating substrate 100 1st coil part 100a Circumferential area 100b Transition area 110-160 Turn 111-116, 121-126, 131-136, 141-146, 151 to 156, 161 to 166 conductor portion 191, 192 Drawout pattern 200 second coil portion 200a circumferential region 200b transition region 210 to 260 turns 211 to 216, 221 to 226, 231 to 236, 241 to 246, 251 to 256 , 261 to 266 conductor portions 291 and 292 lead patterns A1 to A8 and B1 to B8 conductor portions C center points E1, E1a and E1b terminal electrodes E2, E2a and E2b terminal electrodes L0 virtual lines TH1 to TH6 connecting portions THa and THb connecting portions φ magnetic flux

Claims (9)

A first coil section spirally wound over a plurality of turns;
And a second coil portion spirally wound over a plurality of turns;
The first coil portion includes four or more conductor portions radially separated by a spiral slit,
The second coil portion includes four or more conductor portions radially separated by a spiral slit,
Of the four or more conductor parts constituting the first coil part, the inner peripheral end of the conductor part located on the innermost side is the four or more conductor parts constituting the second coil part. A conductor portion located on the innermost side and a conductor portion located on the outermost side are connected to the inner peripheral end of a predetermined conductor portion different from the other;
Of the four or more conductor parts constituting the first coil part, the inner peripheral end of the conductor part located on the outermost side is the four or more conductor parts constituting the second coil part, A coil component characterized in that it is connected to the inner peripheral end of a conductor part located on the innermost circumference side, a conductor part located on the outermost circumference side, and another conductor part different from the predetermined conductor part. The four or more conductor portions constituting the first coil portion include first to sixth conductor portions in order from the outer peripheral side,
The four or more conductor portions constituting the second coil portion include first to sixth conductor portions in order from the outer peripheral side,
The first conductor portion of the first coil portion is connected to one of the third and fourth conductor portions of the second coil portion,
The sixth conductor portion of the first coil portion is connected to the other of the third and fourth conductor portions of the second coil portion,
The first conductor portion of the second coil portion is connected to one of the third and fourth conductor portions of the first coil portion,
The coil component according to claim 1, wherein the sixth conductor portion of the second coil portion is connected to the other of the third and fourth conductor portions of the first coil portion. . The second conductor portion of the first coil portion is connected to the second conductor portion of the second coil portion,
The coil component according to claim 2, wherein the fifth conductor portion of the first coil portion is connected to the fifth conductor portion of the second coil portion. The four or more conductor portions constituting the first coil portion include first to fourth conductor portions in order from the outer peripheral side,
The four or more conductor portions constituting the second coil portion include first to fourth conductor portions in order from the outer peripheral side,
The first conductor portion of the first coil portion is connected to one of the second and third conductor portions of the second coil portion,
The fourth conductor portion of the first coil portion is connected to the other of the second and third conductor portions of the second coil portion,
The first conductor portion of the second coil portion is connected to one of the second and third conductor portions of the first coil portion,
The coil component according to claim 1, wherein the fourth conductor portion of the second coil portion is connected to the other of the second and third conductor portions of the first coil portion. . The outer peripheral end of the first coil portion and the outer peripheral end of the second coil portion are provided at positions adjacent to each other in plan view,
Each of the plurality of turns constituting the first and second coil portions has a circumferential region in which the position in the radial direction does not change and a transition region in which the position in the radial direction transitions.
The transition region extends radially from the center point of the first and second coils, and passes between the outer peripheral end of the first coil portion and the outer peripheral end of the second coil portion. The coil component according to any one of claims 1 to 4, which is located on a line.   The coil component according to claim 5, wherein the inner peripheral ends of the first and second coil portions are located in the transition region.   The coil component according to any one of claims 1 to 6, wherein a pattern shape of the first coil portion and a pattern shape of the second coil portion are the same.   The first coil portion is formed on one surface of an insulating substrate, and the second coil portion is formed on the other surface of the insulating substrate. The coil part as described in a term.   The coil component according to claim 8, wherein the insulating substrate is transparent or translucent.

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