JPH04131919U - coil parts - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose is to provide a coil component used in various electronic devices that can reduce the stray capacitance generated in the winding itself and ensure higher high-frequency impedance. [Structure] A rectangular conducting wire 2 is spirally wound around the outer circumferential surface of a cylindrical bobbin 1, and at least one of the rectangular conducting wires 2 is wound in a spiral groove 3 having a pitch larger than the thickness of the rectangular conducting wire 2 on the outer circumferential surface of the bobbin 1. By fitting and positioning one end surface, stray capacitance is reduced and a coil component with higher high frequency impedance is constructed.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to coil components used in various electronic devices.

0002

[Conventional technology]

In recent years, coil components have shifted from low frequencies to meet the needs for lighter, thinner, and smaller electronic devices. The market has shifted to a type that can be applied up to high frequencies. And in order to achieve higher frequency In addition to conventional improvements to the magnetic core, recent efforts have been made to reduce the stray capacitance that occurs in the winding itself. How can we secure higher high-frequency impedance and how can we achieve it at low cost? However, the problem is that Recently developed, with higher high frequency impedance There are the following products that have improved the winding material and winding method in order to ensure sufficient space.

0003 Conventional coil components will be explained below. FIG. 15 is a perspective view of a conventional coil component. Figure 16 is a rod made of ferrite. FIG. 2 is a perspective view of a conventional coil component using a magnetic core. Figure 17 shows the conventional common model. FIG. 2 is a perspective view of a choke coil component. Also, Figure 18 shows a conventional coil part with a flat angle. FIG. 2 is a perspective view of a device using conductive wires. Figure 19 shows a conventional coil component with a rectangular conductor and a magnetic core. FIG. Figure 20 shows a conventional coil component using flat conductor wire. FIG. 2 is an exploded perspective view of a Mon mode choke coil component. FIG. 21 is a perspective view of the same. 15 to 21, 13 is a round conducting wire with an insulating coating, and 14 is a round conducting wire 13. Insulating coating peeled parts at both ends, 5 is a bar-shaped magnetic core made of ferrite, 15 is a bobbin, 8 is a U-shaped magnetic core made of ferrite, 2 is a rectangular conductor with an insulating coating, 7 is an E-shaped magnetic core, 16 indicates the bobbin, and 17 indicates the collar.

0004 To explain the configuration in FIG. 15, the coil is made using a bobbinless winding method using a round conductor wire 13. The wire is wound in a single layer, and the insulating coating peeled portions 14 are processed at the beginning and end of the winding to complete the process. Ru. The configuration of FIG. 16 is completed by inserting and fixing the rod-shaped magnetic core 5 into the coil component of FIG. 15.

[0005] The configuration of the common mode choke coil component shown in FIG. 3 is wound in a single layer, and the insulating film peeling portions 14 are placed at two locations each at the beginning and end of the winding. Process and finish the coil. Next, the other bobbin 15 is placed in a direction opposite to the coil. Wind the wire in layers and finish the coil in the same way. Insert the U-shaped magnetic core 8 into these two coils. It is completed by entering and fixing.

[0006] The configuration shown in Figure 18 is to wind the rectangular conductive wire 2 in a single layer in a spiral shape using a special winding jig. Apply close winding. Thereafter, the insulation coating is removed 14 to complete the process. The structure of Figure 19 After completing the coil parts shown in FIG. 18, the E-shaped magnetic core 7 is inserted and fixed.

[0007] The configuration shown in Figure 20 uses a special winding jig to tightly wrap the rectangular conductive wire 2 in a spiral shape. Finish the coil by applying winding and removing the insulation coating 14 at the beginning and end of the winding. . Next, the other coil is wound in the opposite direction to the previous coil using another special jig for reverse winding. wire and finish the coil in the same way. These two coils have a bobbin 16 and a collar 17. are inserted, fitted and fixed, and the U-shaped magnetic core 8 is inserted and fixed from both sides to complete the process.

[0008]

[Problem that the idea aims to solve]

However, in the conventional configuration shown in FIG. 15, the stray capacitance generated in the coil is To reduce the amount C0, it is necessary to ensure the number of turns, and increasing the number of turns reduces the stray capacitance C0. can be reduced, but the overall coil length l becomes long, making it impractical for miniaturization. In Figure 16 The configuration shown is one in which a rod-shaped magnetic core 5 is inserted for the purpose of reducing the size of the coil. When using a manganese-based ferrite magnetic core with high magnetic flux, the magnetic core has electrical conductivity, so the core New stray capacitances C1 and C2 are created between the coil and the magnetic core, which increases the high frequency impedance of the coil. You won't be able to secure a dance. In addition, nickel-based ferrite magnets with relatively low conductivity When using a manganese ferrite core in terms of magnetic permeability and saturation magnetic flux density, It is less effective in reducing the size of the coil.

[0009] The configuration shown in FIG. 17 uses the bobbin 15 to increase the distance between the coil and the U-shaped magnetic core 8. Although it is possible to reduce stray capacitances C1 and C2 by separating them, the stray capacitance generated in the coil In order to reduce the amount C0, it is necessary to ensure the number of turns, and the overall length of the coil becomes longer. This makes it an impractical common mode choke coil component.

0010 The configuration shown in FIG. 18 improves the drawbacks of the configuration shown in FIG. 15 by using the rectangular conducting wire 2. Therefore, we aimed to reduce the overall length of the coil while reducing the stray capacitance that occurs in the coil. It is something. However, since this configuration winds the rectangular conductor 2 in a spiral shape, Therefore, a dedicated winding jig is required. Also, since it is a bobbinless winding method, for example, the width is 1 ．． When winding using thin wire type rectangular conductor 2 with a thickness of 0 mm or less, round Compared to type 13 conductor wire, it is difficult to handle because it is easily distorted when the coil is removed from the winding jig. It is not easy to manufacture, and furthermore, the finished coil is in close contact with the side of the rectangular conductor 2. Therefore, the effect of reducing stray capacitance generated in the coil is not sufficient. The structure shown in Figure 19 The configuration also has exactly the same drawbacks as the configuration shown in FIG. Needless to say, high frequency impedance decreases due to stray capacitance between the coil and the magnetic core. not.

[0011] The configuration shown in Figure 20 is a common mode choke coil component, with no separation between the coil and the magnetic core. Since the coil requires an edge function, the coil is wound using a bobbin lathe, in which the rectangular conductor wire 2 is wound using a special winding jig. Since it is a winding method, it is necessary to newly insert and fit the bobbin 16 and collar 17 after winding. This requires a lot of man-hours and is expensive. Also, due to the characteristics, the bobbin 16 and collar Although the stray capacitance generated between the coil and the U-shaped magnetic core 8 is reduced by using 17, , basically the same drawbacks as the configuration shown in FIG. 18 have not been improved.

0012 This invention solves the above-mentioned conventional problems and eliminates stray capacitance generated in the winding itself. Low-cost coil components that can reduce the amount of weight and ensure higher high-frequency impedance The aim is to provide high-quality products at high quality.

[0013]

[Means to solve the problem]

In order to solve the above problems, the present invention has been developed by sprinkling rectangular conductive wire on the outer circumferential surface of a cylindrical bobbin. The rectangular conductor is wound in a circular shape, and a pitch larger than the thickness of the rectangular conductor is placed on the outer peripheral surface of the bobbin. A structure in which at least one end surface of a rectangular conductor is fitted into the spiral groove of the That is.

[0014]

[Effect]

This configuration allows pitch winding of rectangular conductors in spiral grooves directly on the bobbin. This eliminates the need for a dedicated jig for rectangular conductors, and allows for direct winding onto the bobbin. Therefore, there is no need to insert the bobbin after winding, and the already wound coil can be removed from the winding jig. There is no disadvantage that the coil will be distorted when removed, and the number of man-hours can be reduced. Also, pin Due to the switch winding, the sides of the rectangular conductor are not in close contact with each other, so the stray capacitance that occurs in the coil is This can be significantly reduced. This pitch does not change its position easily, so it provides stable quality. High high frequency impedance can be ensured. Furthermore, when inserting a magnetic core into the coil However, since the distance between the coil and the magnetic core is secured by the bobbin, the distance between the coil and the magnetic core is The stray capacitance generated in the Ru.

[0015] For the above reasons, coil parts that are small and can ensure high high frequency impedance are used. It can be provided at low cost and with high quality.

[0016]

【Example】

Hereinafter, one embodiment of the coil component of the present invention will be described with reference to the drawings. Figure below 1 to 13, the parts having the same configuration as the conventional ones in FIGS. 15 to 21 are the same. Detailed explanations will be omitted by assigning numbers. Figure 1 shows a coil showing the first embodiment of the present invention. It is a perspective view of a part. FIG. 2 is a cross-sectional view of the main parts of the coil component. Also, Figure 3 shows the same coil. FIG. 4 is a perspective view of the bobbin of the component, and FIG. 4 is an enlarged view of the groove of the bobbin of the coil component. Figure 1 , 2, 3, and 4, 1 is a bobbin, 2 is a rectangular conducting wire, and 14 is an insulation coating peeled off. Section 3 is a spiral groove. To explain the configuration below, the bobbin 1 shown in FIG. As shown in 4, a spiral groove 3 is provided on the outer periphery, and a rectangular groove is provided in the spiral groove 3. Insert and wind the conductor 2 as shown in Figure 2, and connect the beginning and end of the winding as shown in Figure 1. The coil component is completed by forming insulating film peeling portions 14 on both ends of the rib portion.

[0017] As described above, according to this embodiment, the rectangular conducting wire 2 is arranged in a spiral shape around the outer periphery of the bobbin 1. Since it is wound on the bobbin 1 and positioned by fitting it into the spiral groove 3 provided on the bobbin 1, A dedicated winding jig for the rectangular conductor 2 is no longer required, and the coil has a bobbin 1, making it easy to wind it. There is no need to insert a bobbin after line work, reducing work man-hours. Also spiral groove 3 Due to the pitch of The loose capacitance can be reduced, and the position of this pitch does not change easily, so it is possible to reduce cracks in the insulation coating. Stable quality is maintained even against insulation defects caused by damage such as lasing, pinholes, and scratches. In addition, the heat dissipation of the coil is improved because the sides of the rectangular conductor 2 are not in close contact with each other. As a result, high frequency impedance can be ensured without requiring many man-hours, such as reducing temperature rise. There are many benefits such as being able to maintain

[0018] Next, a second embodiment of the present invention will be described with reference to the drawings. Figure 5 shows the first part of this invention. FIG. 6 is an enlarged view of the groove of the bobbin. figure 5. In Figure 6, 2a is a rectangular conductor without insulation coating, and 4 is a V-shaped spiral groove. be. To explain the structure, a V-shaped spiral groove 4 is formed on the outer peripheral surface of the bobbin, and One end of the rectangular conducting wire 2a without edge coating is fitted and wound to complete the winding.

[0019] As described above, according to this embodiment, by forming the groove into a V-shape, a rectangular groove without an insulating coating can be formed. One end surface of the conductive wire 2a is wedged into the bottom of the V-shaped spiral groove 4 and fixed, and Since the outer end face is stretched during winding, it is work hardened, so it does not move easily in the groove. It is stable with no fluctuations, and short circuits with adjacent windings do not occur due to external stress. , there is no slippage in the rotational direction between the bobbin and the coil after winding, resulting in a stable coil. parts are obtained. In addition, by making the groove V-shaped, the injection molding process during bobbin manufacturing In this case, the resin flows well, making it easy to form grooves and ensure strength. difference Furthermore, by using the rectangular conducting wire 2a without an insulation coating, there is no need to remove the insulation coating. can do. In general, the insulation coating of rectangular conductors is In order to ensure the thickness of the insulation coating in that part, the insulation coating is rolled from the round conductor and applied to the rectangular conductor. Because it is formed by processing, it is made of polyester that can withstand rolling and is less likely to cause crazing or pinholes. Use an insulating material such as imide or polyamideimide. Therefore, insulating coating removal work and Then, it is placed in a soldering bath at about 300℃ to 450℃, which is the typical temperature used for polyurethane. It is difficult to remove using heat or chemical removal using strong acids or alkalis, so mechanical removal is required. It's fleeting. However, this also cannot be peeled off using a general rotary machine like round conductors. However, since it requires special equipment and requires equipment costs and man-hours, it is not necessary to strip the rectangular conductor. The key effect is significant. Moreover, the rectangular conductor 2a without insulation coating is very cheap. You can get a big effect.

[0020] Next, a third embodiment of the present invention will be described with reference to the drawings. Figures 7 and 8 are the main points. It is a perspective view of the coil component which shows the 3rd Example of a plan. 5 is a bar-shaped magnetic core, 1 is a bobbin , 7 is an E-type magnetic core. The configuration shown in FIG. 7 includes a rod-shaped magnetic core 5 and a bobbin 1 in the coil components shown in FIG. It is completed by inserting it inside and fixing it. In addition, the configuration in FIG. 8 can be replaced with the rod-shaped magnetic core 5 in FIG. Thus, the E-shaped magnetic core 7 was inserted and fixed.

[0021] As described above, according to this embodiment, both the coil parts shown in FIGS. 7 and 8 have magnetic cores in the bobbin 1. Even when inserting and using the bobbin 1, make sure that the distance between the coil and the magnetic core is In order to ensure high impedance, the stray capacitance between the coil and the magnetic core can be reduced. Effects such as the ability to reduce the size of the coil components by inserting the magnetic core while ensuring space. There is.

[0022] Next, a fourth embodiment of the present invention will be described with reference to the drawings. Figure 9 is the first example of this invention. FIG. 4 is an exploded perspective view of a common mode choke coil component showing a fourth embodiment. Figure 10 is a perspective view of the same common mode choke coil component. Figures 11 to 13 are from the same model. FIG. 2 is a perspective view of an example of a mode choke coil component molded or cast with resin. figure 14 is a common mode choke coil component of the present invention shown in FIG. 10 and a conventional example shown in FIG. 17. FIG. 3 is a high-frequency impedance characteristic diagram of a Mon-mode choke coil component. Figure 9-Figure In 13, 1a is a bobbin with a different spiral groove direction, 9 is a resin, and 10 is a casting. 11 and 12 indicate the respective cases. The configuration is explained below: bobbin A rectangular conducting wire 2a without an insulating coating is wound around 1. Next, the spiral groove direction is different. Wind the bin 1a in the same way, and insert and secure the U-shaped magnetic core 8 into these two coils to complete the process. to be accomplished. Furthermore, Fig. 11 shows that only the coil parts in Fig. 10 are made by injection molding. Figure 12 shows the coil parts in Figure 10 molded into case 11. The molded material 10 is injected and hardened using. Figure 13 shows the coil parts in Figure 10 as a case. The entire coil including the U-shaped magnetic core 8 is cast using the base 12 and the casting material 10. Ru.

[0023] As described above, according to this embodiment, the main characteristics of the common mode choke coil component In order to ensure a high frequency impedance that is In order to wind the rectangular conducting wire 2a without insulation coating directly in the spiral groove provided, the coil This reduces both the stray capacitance that occurs in the coil and the stray capacitance that occurs between the coil and the U-shaped magnetic core 8. This can be achieved by

[0024] The common mode choke coil component shown in FIG. 10 according to this embodiment and FIG. 1 according to the conventional example The high frequency impedance characteristics of the common mode choke coil component No. 7 are compared to Fig. 14. A comparison is shown.

[0025] As is clear from FIG. 14, the common mode choke coil section according to this embodiment This product has excellent effects in terms of high frequency impedance characteristics. Also common mode In the case of a choke coil, four lead leads are required, and the insulation provided by this example It goes without saying that the effect of eliminating the need for film peeling is significant. Furthermore, Figure 11-Fig. As shown in Figure 13, casting using a resin mold and case results in high heat dissipation. Even if efforts are made to reduce the size, improve safety, and reliability of the Because the sides of the uncoated rectangular conductor wire are separated, the dielectric constant of the resin or cast material increases. This has a small effect on high-frequency impedance, resulting in significant effects.

[0026] In the second and fourth embodiments, the rectangular conducting wire 2a without an insulation coating is used for the coil. However, a rectangular conducting wire 2 with an insulating coating may also be used. Also, in the fourth embodiment In this case, a bobbin 1a with a spiral groove direction different from that of bobbin 1 was used, but the same groove direction Is it possible to form a common mode choke coil component even if two bobbins 1 are used? Needless to say.

[0027]

[Effect of the idea]

As described above, the present invention has a flat conductor wire wound spirally around the outer circumferential surface of a cylindrical bobbin. A spiral with a pitch larger than the thickness of the rectangular conductor is attached to the outer circumferential surface of the bobbin. A spiral groove is provided, and at least one end surface of the rectangular conductor is fitted into this spiral groove. by deciding (1) High frequency impedance. (2) Flat conductor wire can be spiral-wound without a dedicated winding jig. (3) There is no need to insert the bobbin after winding, reducing the number of man-hours. (4) Quality is stable against crazing, pinholes, etc. in the insulation coating. (5) The heat dissipation of the coil is good and temperature rise is reduced. (6) There is little reduction in high frequency impedance due to resin molding, casting, etc. In addition, by making the spiral groove formed on the bobbin V-shaped, (7) Prevents the coil from wobbling from side to side and misaligning in the rotational direction relative to the bobbin. Ru. (8) Injection molding of spiral grooved bobbins becomes easier. In addition, by using flat conductors without insulation coating, (9) There is no need to peel off the insulation coating. (10) Materials are inexpensive. Furthermore, by incorporating a magnetic core into a bobbin wound with flat conductor wire, (11) Coil components can be made smaller while ensuring high frequency impedance. We use coil parts that can achieve great effects such as, and ensure high high frequency impedance. It can be provided at low cost and with high quality, and has great industrial value.

[Brief explanation of drawings]

[Fig. 1] A perspective view of a coil component showing a first embodiment of the present invention.

[Figure 2] Cross-sectional view of the coil component

FIG. 3 is a perspective view of a bobbin of a coil component showing the first embodiment of the present invention.

[Figure 4] Enlarged view of the groove of the bobbin of the same coil component

[Fig. 5] A cross-sectional view of a coil component showing a second embodiment of the present invention.

[Fig. 6] An enlarged view of the groove of the bobbin of the coil component showing the second embodiment of the present invention.

FIG. 7 is a perspective view of a coil component showing a third embodiment of the present invention.

[Fig. 8] A perspective view of the coil component of the third embodiment.

FIG. 9 is an exploded perspective view of a common mode choke coil component showing a fourth embodiment of the present invention.

[Figure 10] Perspective view of the common mode choke coil component

[Figure 11] A perspective view of the same common mode choke coil component molded with resin.

[Figure 12] A perspective view of an example of resin casting using the same common mode choke coil component case.

[Fig. 13] Perspective view of another example

FIG. 14 is a high-frequency impedance characteristic diagram of the common mode choke coil component of the present invention shown in FIG. 10 and the conventional coil component shown in FIG. 17.

[Figure 15] Perspective view of conventional coil components

[Figure 16] Perspective view of conventional coil components

[Figure 17] Perspective view of a conventional common mode choke coil component

[Figure 18] Perspective view of conventional coil components

[Figure 19] Perspective view of conventional coil components

[Figure 20] Exploded perspective view of a conventional common mode choke coil component using flat conductor wires

[Fig. 21] Perspective view of the same

[Explanation of symbols]

1 bobbin 2 Flat conductor wire 3 Spiral groove 4 V-shaped spiral groove 5 Rod-shaped magnetic core 7 E type magnetic core 8 U-shaped magnetic core 9 Resin 10 Cast material 11,12 cases

Claims (4)

[Scope of utility model registration request] Claim 1: A rectangular conductive wire is spirally wound around the outer circumferential surface of a cylindrical bobbin, a spiral groove having a pitch larger than the thickness of the rectangular conductor is provided on the outer circumferential surface of the bobbin, and the rectangular conductor is wound in the spiral groove. A coil component that is positioned by fitting at least one end surface of the coil component. 2. The coil component according to claim 1, wherein the spiral groove formed on the bobbin is V-shaped. 3. The coil component according to claim 1, wherein the rectangular conductor has no insulation coating. 4. The coil component according to claim 1, wherein a magnetic core is assembled in a bobbin wound with a rectangular conducting wire.