KR20150035278A - Coil component - Google Patents

Abstract

The present invention relates to a coil component which can easily take a coil wound inside among multiple coils wound around a bovine to an external connection terminal. For the same, the coil component comprises a bovine including tubular body part, and multiple winding space formed by being divided on the external surface of the body; and multiple coils wound in multiple winding spaces respectively, wherein a coil support part separating the coil from the external surface of the body part is formed on at least one among the winding spaces of the bovine.

Description

Coil Components {COIL COMPONENT}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a coil component, and more particularly, to a coil component capable of easily pulling a coil wound on an inner side among a plurality of coils wound on a bobbin to an external connection terminal.

Various kinds of power sources are required for various electronic devices such as TV (Television), monitor (monitor), PC (personal computer), OA (office automation) Accordingly, such an electronic apparatus generally has a power supply unit for converting an AC power supplied from the outside into a power required for each electronic appliances.

In recent years, a power supply using a switching mode among the power supply (for example, a Switch Mode Power Supply (SMPS)) is mainly used, and this SMPS basically has a switching transformer.

In general, the switching transformer can greatly reduce the size of the core and the bobbin as compared with a general transformer, and can supply the low-voltage and low-current DC power to the electronic appliances in a stable manner. And is widely used for electronic appliances in a trend of miniaturization.

On the other hand, conventional coil parts are manufactured by winding coils on bobbins in a mostly manual manner. Therefore, it takes a long time to manufacture and a manufacturing cost is increased.

Further, in the case of a conventional coil part, when winding a plurality of coils on one bobbin, an insulating tape or the like is used for insulation between the coils, which causes the manufacturing cost to increase.

Accordingly, there is a demand for a coil part capable of mutually insulating a plurality of coils without using an insulating tape while enabling automatic winding to reduce manufacturing time and cost.

Korean Patent Laid-Open Publication No. 2003-0075570

It is an object of the present invention to provide a coil part capable of automatically winding a coil.

Another object of the present invention is to provide a coil component that can realize insulation between coils while winding a plurality of coils to one bobbin.

It is still another object of the present invention to provide a coil component which can easily draw a coil wound on the inside of a plurality of coils wound on a bobbin to an external connection terminal.

A coil component according to the present invention includes: a bobbin including a tubular body portion and a plurality of winding spaces defined in an outer surface of the body portion; And at least one of the winding spaces of the bobbin may be provided with a coil support portion for separating the coil from the outer surface of the body portion.

In the present embodiment, the winding space formed with the coil support portion may be an outer winding space disposed at one end of the body portion among the plurality of winding spaces.

In this embodiment, a coil withdrawing portion may be formed between the coil supporting portion and the outer surface of the body portion and used as a path through which the coil wound in the other winding space is drawn to one end of the body portion.

In this embodiment, the coil support portion may be formed to have a width larger than the diameter of the coil, and may be formed by cutting the coil support portion along the longitudinal direction of the body portion.

In the present embodiment, the bobbin may be divided into the winding spaces by a plurality of flange portions protruding from the outer surface of the body portion in the outer diameter direction.

In this embodiment, at least one of the flange portions may include at least one support groove formed in the outer circumferential surface and supporting the coil drawn out of the body portion in the winding space.

In the present embodiment, the winding spaces are divided into three, and the outer winding spaces at both ends and the inner winding space in the middle may be wound with different coils, respectively.

In this embodiment, the primary winding spaces may be wound in the outer winding spaces, and the secondary winding may be wound in the inner winding spaces.

In the present embodiment, the bobbin is provided with terminal portions at both ends of the body portion, and a plurality of external connection terminals can be fastened to the terminal portion.

In this embodiment, the coil wound in the outer winding spaces is drawn out to the terminal portion of one end of the body portion, and the coil wound around the inner winding space can be drawn out to the terminal portion of the other end portion of the body portion.

In the present embodiment, the coil support portion may be provided in the outer winding space disposed at the other end of the body portion.

According to another aspect of the present invention, there is provided a coil component comprising: a bobbin including a tubular body and a plurality of winding spaces partitioned from an outer surface of the body; And at least one of the winding spaces of the bobbin may be formed with a coil withdrawal portion between a coil wound in the coil and an outer surface of the body portion, .

According to another aspect of the present invention, there is provided a coil component comprising: a bobbin including a tubular body and a plurality of winding spaces partitioned from an outer surface of the body; And a plurality of coils wound on each of the plurality of winding spaces, wherein the coils wound in the inner winding space among the winding spaces are wound around the outer coil space through the coils wound in the outer winding space, Lt; / RTI >

The coil component according to the present invention has three separate winding spaces. A secondary coil is disposed in the center of the winding space, and primary coils are disposed on both sides of the secondary coil. Accordingly, the amount of leakage current can be reduced compared to the conventional arrangement in which the primary coil and the secondary coil are sequentially arranged.

Further, the coil component according to the present invention includes a coil lead formed inside the outer winding space for connecting the secondary coil disposed at the center of the winding space to the external connection terminal. Accordingly, even if the inner coil is wound in the inner winding space and the outer coil is wound in the outer winding space, the inner coil can be easily drawn out to the outside of the outer winding space through the coil lead- And there is an advantage that automatic winding is easy.

Also, even if the secondary coils are interposed between the primary coils as described above, the secondary coils can be easily connected to the external connection terminals through the coil lead-out portions, which is advantageous in that the secondary coils can be easily manufactured.

1 is a perspective view schematically showing a coil part according to an embodiment of the present invention;
Fig. 2 is an exploded perspective view of Fig. 1; Fig.
3 is a side view of the coil part shown in Fig.
4 is a partially cutaway perspective view of a bobbin according to the present embodiment;
5 is a cross-sectional view along AA 'of FIG. 2;
6 is a plan view along the direction B in Fig.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, the embodiments of the present invention can be modified into various other forms, and the scope of the present invention is not limited to the embodiments described below. Further, the embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art. In addition, the shape and size of elements in the figures may be exaggerated for clarity.

Fig. 1 is a bottom perspective view schematically showing a coil part according to an embodiment of the present invention, Fig. 2 is an exploded perspective view of Fig. 1, and Fig. 3 is a side view of the coil part shown in Fig. Here, the coil is omitted in FIGS. 2 and 3 for convenience of explanation.

1 to 3, a coil component 100 according to an embodiment of the present invention may include two common mode choke coils. For this purpose, the bobbin 10, the core 40 ), And a coil (50).

The bobbin (10) forms the overall body of the coil component (100). The bobbin 10 can be easily manufactured by injection molding, but is not limited thereto. In addition, the bobbin 10 according to the present embodiment is preferably made of an insulating resin, and may be made of a material having high heat resistance and high withstand voltage.

The bobbin 10 may include a winding portion 12 to which the coil 50 is wound and a terminal portion 20 formed at both ends of the winding portion 12. [

The winding part 12 may include a body part 13 formed in a pipe shape and a plurality of flange parts 15 extending in an outer diameter direction from the body part 13. [

The body portion 13 has a through hole through which a part of the core 40 is inserted. A coil (50) is wound on the outer surface of the body part (13).

The flange portion 15 is formed so as to protrude in both ends of the body portion 13 and in the outer side in the radial direction. More specifically, a total of four flange portions 15 according to the present embodiment are provided, so that the outer space of the body portion 13 is divided into a total of three winding spaces 12a, 12b, and 12c. However, the present invention is not limited thereto and various modifications are possible.

Therefore, the space formed between the two flange portions 15 adjacent to the outer circumferential surface of the body portion 13 can be used as the winding spaces 12a, 12b, and 12c in which the coils 50 are independently wound. The flange portion 15 serves to support the coils 50 wound on the winding spaces 12a, 12b and 12c from both sides and protects the coils 50 from the outside, Thereby securing insulation between the electrodes.

Also, at least one support groove 16 may be formed on the outer periphery of the flange portion 15 according to the present embodiment. The support groove 16 is formed in the outer connection terminal 60 so that the coil 51 to be wound in the winding spaces 12b and 12c (hereinafter referred to as outer winding spaces) disposed on the outer side among the three winding spaces 12a, 12b, As shown in FIG.

The coil component 100 according to the present embodiment is connected to an external connection terminal 60 disposed on the opposite side of the coil 51 wound on the external winding space 12c across the other winding spaces 12a and 12b . At this time, the coil 51 is supported by the flange portion 15 and traverses the other winding spaces 12a and 12b. The support groove 16 is provided for fixing and supporting the coil 51 do. Accordingly, the support groove 16 can be formed in various shapes and various sizes as long as the movement of the coil 51 can be fixed.

In this embodiment, the support grooves 16 are formed only in the flange portions 15 disposed on the inner side. However, the support grooves 16 are not limited thereto and may be formed on the outer flange portion 15 . It is also possible to form a larger number of support grooves 16 in accordance with the number of coils 51 and the like.

At least one winding space 12c of the plurality of winding spaces 12a, 12b and 12c according to the present embodiment is configured such that the bottom surface on which the coil 51 is wound is spaced apart from the outer surface of the body portion 13 .

Fig. 4 is a partially cutaway perspective view showing the bobbin according to the present embodiment, Fig. 5 is a cross-sectional view along AA 'in Fig. 2, and Fig. 6 is a plan view along the direction B in Fig. .

4 to 6, a separate bottom surface 17 (hereinafter referred to as coil supporting portion) is formed in one outer winding space 12c to be spaced apart from the outer surface of the body portion 13, 17) and the outer surface of the body portion 13 are formed with a gap 18 (hereinafter referred to as a coil lead-out portion).

Here, the coil supporting portion 17 according to the present embodiment is formed corresponding to a part of the body portion 13, not the entire body portion 13. [ Therefore, the coil 51 wound on the outer winding space 12c can be wound using the outer surface of the body portion 13 and the coil supporting portion 17 as the bottom surface.

The coil withdrawing portion 18 formed by the coil supporting portion 17 is constituted by a coil 52 wound on a winding space 12a (hereinafter, referred to as inner winding space hereinafter) arranged in the middle among the three winding spaces 12a, 12b and 12c The inner coil) to the external connection terminal 60. Therefore, the coil support portion 17 and the coil lead-out portion 18 can be formed in at least one of the outer winding spaces 12b and 12c.

Further, the coil supporting portion 17 may be formed to extend in the outer diameter direction from the shape of the body portion 13. The outer winding space 12c in which the coil supporting portion 17 is formed can be formed to have a thicker thickness than the other winding spaces 12a and 12b.

The coil lead-out portion 18 is used as a passage through which the inner coil 52 is drawn out as described above. Therefore, a gap is formed at an interval larger than the diameter of the inner coil 52.

In addition, the outer winding space 12c may be formed with a cutting groove 19.

The cutout groove 19 is formed by cutting both the coil supporting portion 17 and the flange portion 15. The cutout groove 19 may be formed to have a width larger than the diameter of the inner coil 52 so that the inner coil 52 can be easily inserted into the coil lead-

This cutout groove 19 is provided for disposing the inner coil 52 in the coil lead-out portion 18. 4, the inner coil 50 is disposed in the coil lead-out portion 18 through the cut-out groove 19, and then is wound around the inner coil winding portion 12a. And the coil 50 is again disposed in the coil lead-out portion 18 through the cutout groove 19 and can be drawn out to the outside.

Meanwhile, in the present embodiment, the incision groove 19 is formed to cross the center of the coil support portion 17, but the present invention is not limited thereto and may be formed at various positions as needed .

The coil component 100 according to this embodiment can also be manufactured by automatically winding the coil 50 on the bobbin 10 through an automatic winding device (not shown). Therefore, the cutout groove 19 can be formed in a width such that the nozzle of the automatic winding apparatus can be easily moved in the automatic winding process.

The terminal portion 20 may be formed to extend outward from both ends of the body portion 13 of the bobbin 10 and at least one external connection terminal 60 may be fastened.

The terminal portion 20 according to the present embodiment may be formed in a shape in which a part of the inner surface of the body portion 13 extends and may be formed in a shape substantially perpendicular to the flange portion 15. [

Also, the terminal portion 20 may be formed symmetrically with respect to the body portion 13, but the terminal portion 20 may be formed to have a longer one.

In addition, the terminal portion 20 according to the present embodiment may include a plurality of guide projections 27 and guide grooves 28.

The guide protrusions 27 may be formed in such a manner that a plurality of the guide protrusions 27 protrude in parallel to the outer diameter direction of the body portion 13 from the side surface of the terminal portion 20. Further, the external connection terminals 60 can be fastened to the respective guide projections 27, respectively.

The guide protrusion 27 can guide the lead wire so that the lead wire of the coil 50 wound on the winding portion 12 can be easily disposed to the external connection terminal 60. [ Therefore, the guide protrusion 27 can protrude beyond the diameter of the coil 50 to firmly support and guide the coil 50 disposed therebetween.

The guide groove (28) is formed by the guide projection (27). That is, the guide groove 28 may be a groove formed between the adjacent guide projections 27.

The guide groove 28 can be used as a path through which the lead wire of the coil 50 wound on the winding portion 12 is led out to the outside of the terminal portion 20. [ That is, the lead wire drawn out from the winding section 12 can be inserted into the guide groove 28 and connected to the external connection terminal 60 after passing through the guide groove 28. Therefore, the width of the guide groove 28 can be formed to be wider than the diameter of the coil 50.

The external connection terminal 60 can be fastened in such a manner as to protrude outward from the terminal portion 20, that is, the guide projection 27.

In this embodiment, the external connection terminal 60 is fastened to the terminal portion 20 in the longitudinal direction of the body portion 13. However, the present invention is not limited thereto. That is, various applications such as fastening the external connection terminal 60 in the outer diameter direction of the body portion 13 are possible.

The bobbin 10 according to the present embodiment thus configured can be easily manufactured by injection molding, but is not limited thereto. In addition, the bobbin 10 according to the present embodiment is preferably made of an insulating resin, and may be made of a material having high heat resistance and high withstand voltage. For example, as the material forming the bobbin 10, polyphenylene sulfide (PPS), liquid crystal polyester (LCP), polybutylene terephthalate (PBT), polyethylene terephthalate (PET) But is not limited to.

The core 40 is partially inserted into a through hole formed in the bobbin 10 to form a magnetic path for electromagnetic coupling with the coil 50.

The core 40 according to the present embodiment is formed as a pair, and a part of the core 40 may be inserted into the through hole of the bobbin 10 so as to be in contact with each other. The present invention is not limited to this, but may be applied to various types of cores such as an EI core, a UU core, and a UI core, as needed. (40) may be used.

The core 40 may be formed of Mn-Zn ferrite having high permeability, low loss, high saturation magnetic flux density, stability, and low production cost compared to other materials. However, the shape and material of the core 40 are not limited in the embodiment of the present invention.

The coil 50 is wound on the winding portion 12 of the bobbin 10 and may include a primary coil 51 and a secondary coil 52.

The primary coil 51 and the secondary coil 52 may include a plurality of individual coils electrically insulated from each other. Here, the number of individual coils of the primary coil 51 and the secondary coil 52 can be appropriately changed as necessary.

The primary coil 51 according to the present embodiment is wound around the outer winding spaces 12b and 12c formed at both ends of the three winding spaces 12a, 12b and 12c. The secondary coil 52 is wound around the inner winding space 12a formed in the center. In this case, the primary coil 51 and the secondary coil 52 can be insulated from each other at the flange portion 15.

When the primary coil 51 is disposed in the two outer winding spaces 12b and 12c and the secondary coil 52 is disposed in the inner winding space 12a therebetween, The amount of current can be minimized. However, the present invention is not limited thereto, and various applications are possible as needed, for example, the secondary coil 52 is disposed in the outer winding space 12c or both the inner and outer winding spaces 12a and 12c .

The coil 50 according to the present embodiment may be a conventional insulation coil (for example, a polyurethane wire or the like), and may be a twisted wire coil formed by twisting a plurality of wires Wire, Litz wire, etc.) can be used. It can also be selectively used as needed by using multiple insulation coils (e.g., TIW, Triple Insulated Wire) with high insulation.

Meanwhile, in the coil 50 according to the present embodiment, both the primary coil 51 and the secondary coil 52 may be formed of a general insulation coil. In this case, in the coil component 100 according to the present embodiment, the insulating tape 120 may be disposed on the outer surface of the coil 50. In this embodiment, the case where the insulating tape 120 is disposed only on the outer side of the secondary coil 52 is taken as an example. This is provided to mutually isolate the secondary coil 52 and the primary coil 51 traversing the outside of the secondary coil 52. [

However, the present invention is not limited thereto. For example, it is possible to use multiple insulation coils for the primary coil 51 and use a general insulation coil for the secondary coil 52 or vice versa. In this case, the insulating tape 120 may be omitted.

The coil component according to this embodiment thus constituted has three separate winding spaces. A secondary coil is disposed in the center of the winding space, and primary coils are disposed on both sides of the secondary coil. Accordingly, the amount of leakage current can be reduced compared to the conventional arrangement in which the primary coil and the secondary coil are sequentially arranged.

The coil component according to this embodiment further includes a coil lead formed inside the outer winding space for connecting the secondary coil disposed at the center of the winding space to the external connection terminal. Accordingly, even if the inner coil is wound in the inner winding space and the outer coil is wound in the outer winding space, the inner coil can be easily drawn out to the outside of the outer winding space through the coil lead- And there is an advantage that automatic winding is easy.

Also, even if the secondary coils are interposed between the primary coils as described above, the secondary coils can be easily connected to the external connection terminals through the coil lead-out portions, which is advantageous in that the secondary coils can be easily manufactured.

The above-described coil component according to the present invention is not limited to the above-described embodiments, and various applications are possible.

For example, in the above-described embodiment, the case where the coil withdrawing portion is formed on the bottom surface, that is, the bottom surface of the bobbin is taken as an example. However, the present invention is not limited thereto. That is, it is also possible to form the coil lead-out portion on the side surface or the upper surface of the bobbin, or to form a plurality of coil lead-out portions instead of one.

Further, the coil component according to the above-described embodiment is exemplified as a case where the flange portion of the bobbin is disposed further downward than the external connection terminal. This is a structure for forming a through hole in the substrate and mounting the coil component on the substrate so that the bobbin is received in the through hole. Therefore, the present invention is not necessarily limited to this, and may be modified into various forms depending on the shape of the external connection terminal and the fastening position.

Also, the coil part according to the above-described embodiment is exemplified as a case where the coil supporting portion and the coil drawing portion are formed only in the outer winding space. However, the present invention is not limited thereto, and it can be formed in the inner winding space and can be formed in a plurality of winding spaces.

In the above-described embodiment, the choke coil of the coil component is described as an example. However, the present invention is not limited thereto, and can be applied variously as long as it is a component that uses a coil such as a transformer, or an electronic device having the coil.

100 ..... coil parts
10 ..... Bobbin
12 ..... Winding part 13 ..... Body part
15 ..... flange section
16 ..... support groove
17 ..... coil supporting part 18 ..... coil drawing part
19 ..... incision home
20 ..... terminal part
40 ..... coil 50 ..... coil
51 ..... primary coil 52 ..... secondary coil
60 ..... External connection terminal 120 ..... Insulation tape

Claims (13)

A bobbin including a tubular body portion and a plurality of winding spaces defined in an outer surface of the body portion; And
A plurality of coils wound respectively in the plurality of winding spaces;
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At least one of the winding spaces of the bobbin,
And a coil support portion for separating the coil from the outer surface of the body portion.
The method according to claim 1,
Wherein the winding space in which the coil support part is formed is a coil part that is an outer winding space disposed at one end of the body part among the plurality of winding spaces
3. The method of claim 2,
And a coil withdrawing portion formed between the coil supporting portion and the outer surface of the body portion, the coil withdrawing portion being used as a path through which the coil wound in the other winding space is drawn to one end of the body portion.
The method according to claim 1,
And a cutting groove formed to have a width larger than the diameter of the coil and formed by cutting the coil supporting portion along the longitudinal direction of the body portion.
The bobbin according to claim 1,
Wherein the winding spaces are defined by a plurality of flange portions protruding from an outer surface of the body portion in an outer diameter direction.
6. The apparatus of claim 5, wherein the at least one flange portion comprises:
And at least one support groove formed on the outer circumferential surface and supporting the coil drawn out of the body portion in the winding space.
The method according to claim 1,
Wherein the winding spaces are divided into three, wherein the outer winding spaces at both ends and the inner winding space in the middle are respectively wound with different coils.
8. The method of claim 7,
Wherein the primary winding spaces are wound in the outer winding spaces and the secondary winding is wound in the inner winding spaces.
8. The bobbin according to claim 7,
Wherein a terminal portion is formed at both ends of the body portion, and a plurality of external connection terminals are fastened to the terminal portion.
10. The method of claim 9,
Wherein a coil wound on the outer winding spaces is drawn out to the terminal portion of one end of the body portion and a coil wound on the inner winding space is drawn out to the terminal portion on the other end of the body portion.
10. The apparatus according to claim 9,
And a coil part provided in the outer winding space disposed at the other end of the body part.
A bobbin including a tubular body portion and a plurality of winding spaces defined in an outer surface of the body portion; And
A plurality of coils wound respectively in the plurality of winding spaces;
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Wherein at least one of the winding spaces of the bobbin has a coiled portion formed between an inner wound coil and an outer surface of the body portion.
A bobbin including a tubular body portion and a plurality of winding spaces defined in an outer surface of the body portion; And
A plurality of coils wound respectively in the plurality of winding spaces;
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Wherein a coil wound in the inner winding space of the winding spaces is drawn out to the outside through a coil wound around the outer winding space and a gap formed between the body portion.

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