KR101656013B1 - Coil component - Google Patents

Abstract

A coil component according to an embodiment of the present invention includes a bobbin having a tubular body portion having a through hole and a plurality of flanges protruding outwardly from the body portion, a plurality of coils wound on the bobbin, A core inserted into the hole and magnetically coupled with the coil, and an element coupled to the bobbin and electrically connected to the coil.

Description

Coil Components {COIL COMPONENT}

The present invention relates to a coil component in which an inductor and a transformer are integrally formed.

Power supplies for LED lighting typically include PFC inductors and DC-DC transformers. Conventionally, a PFC inductor and a DC-DC transformer are separately manufactured and mounted on a substrate.

Therefore, the manufacturing time is increased and the manufacturing cost is also increased.

Japanese Patent Application Laid-Open No. 2009-239219

SUMMARY OF THE INVENTION An object of the present invention is to provide a coil component capable of integrally forming an inductor and a transformer.

A coil component according to an embodiment of the present invention includes a bobbin having a tubular body portion having a through hole and a plurality of flanges protruding outwardly from the body portion, a plurality of coils wound on the bobbin, A core inserted into the hole and magnetically coupled with the coil, and an element coupled to the bobbin and electrically connected to the coil.

Here, the bobbin may be divided into an inductor unit in which the inductor coil is wound and a transformer unit in which the transformer coil is wound.

The coil component according to an embodiment of the present invention includes a tubular body portion having a through hole, a bobbin having a plurality of flanges protruding outwardly from the body portion, an inductor coil wound around the bobbin, and a plurality of A transformer coil of; And a core inserted into the through hole and electromagnetically coupled with the coil, wherein the inductor coil is a multi-tap inductor coil having a plurality of extraction taps per section, A plurality of coupling protrusions electrically connected to the inductor coil may function as the extraction tabs.

The coil component according to the present invention is provided with an inductor and a transformer in one component. In addition, it includes an element portion on which a device is mounted. Therefore, it is possible to obtain the effect of mounting a plurality of parts by merely mounting one part on the main board. Therefore, there is an advantage that it is easy to manufacture an electronic device including a coil part.

In addition, the coil component according to this embodiment is formed of a multi-tap inductor having a plurality of inductors, and can electrically connect desired taps and elements as required. Therefore, it is possible to provide various inductances according to the condition of the electronic device in which the coil component is mounted, so that one coil component can be widely used in various electronic devices.

1 is a perspective view of a coil component according to an embodiment of the present invention;
Fig. 2 is a partially exploded perspective view showing the element part in the coil part shown in Fig. 1; Fig.
FIG. 3 is an exploded perspective view of FIG. 1; FIG.
Fig. 4 is a perspective view showing the coil in Fig. 1 without the coil. Fig.
Figure 5 is a side view of Figure 4;
Fig. 6 is a circuit diagram schematically showing a power supply device in which the coil component shown in Fig. 1 is used. Fig.
FIG. 7 is a perspective view showing a case where another tab is used in the coil part shown in FIG. 1; FIG.

Prior to the detailed description of the present invention, the terms or words used in the present specification and claims should not be construed as limited to ordinary or preliminary meaning, and the inventor may designate his own invention in the best way It should be construed in accordance with the technical idea of the present invention based on the principle that it can be appropriately defined as a concept of a term to describe it. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention, and are not intended to represent all of the technical ideas of the present invention. Therefore, various equivalents It should be understood that water and variations may be present.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Note that, in the drawings, the same components are denoted by the same reference symbols as possible. Further, the detailed description of known functions and configurations that may obscure the gist of the present invention will be omitted. For the same reason, some of the elements in the accompanying drawings are exaggerated, omitted, or schematically shown, and the size of each element does not entirely reflect the actual size.

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

FIG. 1 is a perspective view of a coil part according to an embodiment of the present invention, FIG. 2 is a partially exploded perspective view showing the element part in the coil part shown in FIG. 1, and FIG. 3 is an exploded perspective view of FIG. Respectively.

FIG. 4 is a perspective view of FIG. 1, with the coil omitted. FIG. 5 is a side view of FIG.

1 to 5, a coil component 100 according to an embodiment of the present invention may include a bobbin 10, a coil 50, a core 60, and an element portion 80 .

The bobbin 10 may include a body portion 11 formed in a tubular shape and a plurality of flange portions 13 protruding from the body portion 11 as shown in FIGS.

A through hole 12 is formed in the inside of the body portion 11 and a core 60 forming a magnetic path can be inserted into the through hole 12.

A flange portion 13 may be formed on the outer surface of the body portion 11. The flange portion 13 includes a plurality of flanges 13a to 13d extending radially outward from the outer surface of the body portion 11 and divides the bobbin 10 into a plurality of spaces.

The coil component 100 according to the present embodiment may be divided into an inductor part IN, a transformer part TR and a core inserting part CI as shown in FIG. The inductor portion IN, the transformer portion TR, and the core inserting portion CI can be separated by the flange portion 13.

More specifically, the flange portion 13 includes first and second flanges 13a and 13b (hereinafter referred to as an inductor flange) disposed at both ends of the inductor portion IN, and third and fourth flanges 13b and 13b disposed at both ends of the transformer portion TR. And fourth flanges 13c and 13d (hereinafter referred to as a transformer flange). The first flange 13a disposed on the outer side of the inductor portion IN is formed with a first terminal coupling portion 30a and the fourth flange 13d disposed on the outer side of the transformer portion TR A fourth terminal fastening portion 30d to be described later is formed.

The core inserting portion CI is disposed between the inductor portion IN and the transformer portion TR. The core insertion portion CI may be formed as a space between the second flange 13b of the inductor portion IN and the third flange 13c of the transformer portion TR.

Also, at least one partition 17a, 17b, 17d may be formed between the two inductor flanges 13a, 13b and between the two transformer flanges 13c, 13d.

The inductor part IN can be used as a PFC inductor by winding one coil 51 on the body part 11 and can be divided into a plurality of winding spaces by a plurality of partitions 17a and 17b.

The partition walls 17a and 17b formed in the inductor portion IN may include at least one carry groove (14 in FIG. 3) and a conductive coupling protrusion 15.

The carry groove 14 is a groove in which the coil 51 wound on the inductor portion IN is carried over to another winding space. Therefore, the carryover grooves 14 can be formed in all the partition walls 17a and 17b formed in the inductor portion IN.

The coupling protrusion 15 may be electrically connected to an inductor coil (51 in Fig. 5) wound on the inductor portion IN. The inductor coil 51 according to the present embodiment is electrically connected to the coupling protrusion 15 formed in the carry groove 14 in the process of being carried through the carry groove 14. [ Therefore, all the coupling protrusions 15 disposed in the inductor portion IN are electrically connected to the inductor coil 51. [

The coupling protrusions 15 may be formed not only on the partition walls 17a and 17b formed in the inductor portion IN but also on the flanges 13b and 13c and other partition walls 17c. Further, the engaging projections 15 are fastened in such a manner that the flanges 13b, 13c and the partition walls 17a, 17b, 17c are further projected to the outside. At this time, the length of the engaging projection 15 projecting further from the flanges 13b, 13c and the partition walls 17a, 17b, 17c may be longer than the thickness of the substrate 81 described later.

Since the inductor coil 51 is electrically connected to the coupling protrusions 15 in the respective partitions 17a and 17b, the inductor coil 51 according to the present embodiment functions as a multi-tap inductor do. That is, each of the coupling protrusions 15 functions as a tap formed at various places of the inductor coil 51, and a desired inductance can be obtained by electrically connecting desired ones of the various taps.

At least one partition 17c may be formed in the core insertion portion CI. At least one carry groove 14 and a coupling protrusion 15 may be formed in the partition wall 17c of the core insertion portion CI.

In addition, a second terminal securing portion 30b, which will be described later, is formed on the partition wall 17c formed in the core inserting portion CI. The coupling protrusion 15 formed on the partition wall 17c is electrically connected to the external connection terminal 40 fastened to the second terminal coupling portion 30b. In the present embodiment, electrical connection between the coupling protrusion 15 and the external connection terminal 40 is performed by embedding a conductor (45 in FIG. 3) in the partition wall 17c. However, the present invention is not limited thereto, and various methods such as using a separate wire can be used.

The second flange 13b for separating the core insertion portion CI from the inductor portion IN and the third flange 13c for separating the core insertion portion CI from the transformer portion TR are also provided with the carry groove 14 and a coupling protrusion 15 may be formed.

The core insertion portion CI according to the present embodiment is formed with a through hole 12a passing through the body portion 11. The I-shaped core 62 is inserted into the through hole 12a. The core 62 inserted into the through hole 12a is combined with the E-shaped core 61 inserted into the through hole 12 of the body portion 11 to complete the magnetic path.

At least one partition 17d may be formed in the transformer TR. Only the carry groove 14 is formed in the partition wall 17d of the transformer. However, a coupling protrusion may be added as needed.

The third flange 13c is formed with a third terminal fastening portion 30c to be described later.

The terminal fastening part 30 according to the present embodiment may be formed to protrude from the flange part 13 or the partition wall 17c. More specifically, the terminal fastening portion 30 according to the present embodiment may be formed so as to protrude in a direction perpendicular to the longitudinal direction of the body portion 11 at the lower end of the flange portion 13 or the partition wall 17c. However, the present invention is not limited thereto, and various applications are possible if necessary.

At the end of the terminal fastening part 30, an external connection terminal 40, which will be described later, may be fastened to the outside.

The external connection terminal 40 is formed so as to protrude outward from the terminal fastening part 30 and may be formed in accordance with the shape or structure of the coil part 100 or the structure of the main board And may be formed in various shapes.

The terminal fastening part 30 according to this embodiment can be divided into the first to fourth terminal fastening parts 30a to 30d. The first terminal fastening portion 30a is formed on the first flange 13a and the second terminal fastening portion 30b is formed on the partition wall 17c of the core insertion portion CI. The third terminal fastening portion 30c is formed on the third flange 13c and the fourth terminal fastening portion 30d is formed on the fourth flange 13d.

The first and second terminal fastening portions 30a and 30b are used to electrically connect the coil 51 wound on the inductor portion IN to the main board. One end of the coil 51 wound on the inductor portion IN is electrically connected to the external connection terminal 40 formed on the first terminal coupling portion 30a and the other end is electrically connected to the core insertion portion CI partition wall 17c, And is electrically connected to the external connection terminal 40 of the second terminal securing portion 30b through the coupling protrusion 15 of the first terminal securing portion 30b and the conductor 45. [

The third and fourth terminal fastening portions 30c and 30d are used for electrically connecting the primary coil and the secondary coil, which are wound around the transformer portion TR, to the main board.

The element portion 80 may include a substrate 81 and at least one element 87 mounted on the substrate 81. [

The substrate 81 may be a printed circuit board (PCB). However, the present invention is not limited thereto, and can be variously used as long as it is a substrate on which a conductor pattern is formed on an insulating layer such as a flexible substrate, a ceramic substrate, or a glass substrate.

A plurality of insertion holes 82 may be formed on the substrate 81. The insertion hole 82 is a hole into which the engaging projection 15 of the above-described bobbin 10 is inserted. Therefore, the insertion hole 82 can be formed as a hole sized to easily insert the coupling protrusion 15, and a plurality of the holes can be spaced apart corresponding to the separation distance of the coupling protrusions 15.

A bonding pad 83 is formed around the insertion hole 82. The bonding pad 83 is formed at a position spaced apart from the insertion hole 82 by a certain distance. Therefore, even if the coupling protrusion 15 is inserted into the insertion hole 82, the coupling protrusion 15 and the bonding pad 83 are not electrically connected to each other, and electrical connection is made only through a conductive member such as solder 90 It is possible.

2) and the coupling protrusions 15 formed on the partition walls 17c of the core insertion portion CI and the corresponding coupling protrusions 15a of the second insertion flange 13c At least one element 87 may be disposed between the corresponding bonding pads 83b (hereinafter referred to as second bonding pads). Here, the element 87 may be a diode, but is not limited thereto.

Thus, the first bonding pad 83a and the second bonding pad 83b are electrically connected by the element 87. [

The remaining bonding pads 83 are portions where the bonding protrusions 15 of the inductor portion IN are inserted and are all electrically connected to the second bonding pads 83b through the wiring pattern 84 .

The bobbin 10 according to the present embodiment described above 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. Examples of the material for forming the bobbin 10 include polyphenylene sulfide (PPS), liquid crystal polyester (LCP), polybutylene terephthalate (PBT), polyethylene terephthalate (PET) Can be used.

The core 60 may include an E-shaped core 61 and an I-shaped core 62 having a middle and an outer portion and includes a first core 60a coupled to the inductor portion IN and a second core 60b coupled to the transformer portion TR. And a second core 60b coupled to the second core 60b.

Therefore, the core 60 may be provided with a pair of sun-shaped cores 60 formed by the E-shaped core 61 and the I-shaped core 62, The E type core 61 is inserted through the hole 12 and the I type core 62 is inserted through the through hole 12a formed in the core insertion portion CI so as to be in contact with each other to form a closed magnetic path .

The material of the core 60 may be formed of a magnetic material and may be formed of a Mn-Zn ferrite having a high permeability, a low loss, a high saturation magnetic flux density, stability, and a low production cost as compared with other materials. However, the shape and material of the core 60 are not limited in the embodiment of the present invention.

The coil 50 may include an inductor coil 51 wound on an inductor portion IN of the bobbin 10 and a transformer coil 52 wound on the transformer portion TR.

The coil 50 may be formed of a single coil but is not limited thereto.

In addition, the inductor coil 51 according to this embodiment is a multi-tap inductor coil having a plurality of lead-out taps per section, and the lead-out tabs are formed by using the above- do.

That is, the inductor coil 51 is electrically connected to the coupling protrusions 15 formed on the partition walls 17a and 17b each time the partition walls 17a and 17b are carried, (Not shown).

The coil 52 wound on the transformer portion TR may include a primary coil and a secondary coil.

The primary coil and the secondary coil may be wound separately from each other by the partition 17d, but the present invention is not limited to this, and the primary coil and the secondary coil may be wound so as to be stacked on one another in the same winding space.

At least one of the primary coil and the secondary coil may be a multiple insulation coil (e.g., TIW, Triple Insulated Wire). However, the present invention is not limited thereto.

 FIG. 6 is a circuit diagram schematically showing a power supply device in which the coil component shown in FIG. 1 is used, schematically showing a circuit of a power supply device for converting and supplying AC power to DC.

Referring to this, the power supply includes a PFC inductor and a transformer, and a boost diode is connected between the PFC inductor and the transformer.

In the coil component 100 according to the present embodiment, the PFC inductor, the transformer, and the boost diode are integrally formed as one component.

Therefore, by mounting one coil component according to the present embodiment on the main board, the PFC inductor, the transformer, and the boost diode can be collectively disposed.

Further, since the distance between the boost diode and the transformer can be minimized, it is possible to minimize parasitic inductance and noise generated between circuit patterns.

The coil component according to the present embodiment configured as described above is provided with an inductor and a transformer together in one component. In addition, it includes an element portion 80 on which a device is mounted. Therefore, it is possible to obtain the effect of mounting a plurality of parts by merely mounting one part on the main board. Therefore, there is an advantage that it is easy to manufacture an electronic device including a coil part.

Also, the coil component according to this embodiment is formed of a multi-tap inductor in which the inductor has a plurality of taps. FIG. 7 is a perspective view showing a case where different taps are used in the coil part shown in FIG. 1. FIG.

As shown in FIGS. 1 and 7, the coil component according to the present embodiment can variably utilize the inductor coil by electrically connecting the desired tab and element as needed.

Therefore, it is possible to provide various inductances according to the condition of the electronic device in which the coil component is mounted, so that one coil component can be widely used in various electronic devices.

Also, since at least one element (for example, a diode) is integrally formed on the coil component 100, the number of elements to be mounted on the main board and the mounting area can be reduced. Therefore, the sizes of the main board and the electronic device can be reduced.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be obvious to those of ordinary skill in the art.

100: Coil parts
10: Bobbin
30: Terminal fastening portion
40: External connection terminal
50: Coil
60: Core
80:

Claims (16)

A bobbin having a tubular body portion having a through hole and a plurality of flanges protruding from the body portion in an outer diameter direction and each having at least one coupling protrusion;
A plurality of coils wound on the bobbin;
A core inserted in the through hole and electromagnetically coupled with the coil; And
A substrate having an insertion hole into which the coupling protrusion is inserted, and at least one element mounted on the substrate, the element being electrically connected to the coil;
≪ / RTI >
The bobbin according to claim 1,
The coil part is divided into an inductor part in which the inductor coil is wound and a transformer part in which the transformer coil is wound.
The bobbin according to claim 2,
And a core insertion portion formed between the inductor portion and the transformer portion.
The bobbin according to claim 1,
And at least one partition disposed between the flanges to divide the winding space of the coil.
5. The bobbin according to claim 4,
And at least one engaging projection projecting from the partition.
delete 2. The device of claim 1,
Coil parts as diode elements.
The substrate processing apparatus according to claim 1,
And a bonding pad formed along the periphery of the insertion hole and spaced apart from the insertion hole.
9. The method of claim 8,
And the coupling protrusion is electrically connected to the bonding pad via a conductive member.
The inductor coil according to claim 5, wherein the coil includes an inductor coil,
And a coil part electrically connected to the coupling protrusion.
The inductor coil according to claim 10, wherein the inductor coil
A multi-tap inductor coil having a plurality of lead-out taps for each section, and a plurality of the coupling protrusions function as the lead-out tabs.
6. The method of claim 5,
At least one of the barrier ribs and the flanges is formed with a carry groove, which is a passage through which the coil moves to another winding space,
And the coupling protrusions are formed protruding from the carry groove.
The connector according to claim 3,
And a through hole through which the core is inserted through the body portion.
The connector according to claim 3,
Wherein at least one partition wall having a conductive coupling protrusion formed on an upper portion thereof and a terminal coupling portion protruding from a lower end of the partition wall are coupled to the terminal coupling portion and a terminal pin electrically connected to the coupling protrusion is coupled to the terminal coupling portion.
A bobbin having a tubular body portion having a through hole and a plurality of flanges protruding from the body portion in an outer diameter direction and each having at least one coupling protrusion;
An inductor coil wound around the bobbin and a plurality of transformer coils;
A core inserted in the through hole and electromagnetically coupled with the coil; And
A substrate having an insertion hole into which the coupling protrusion is inserted, and at least one element mounted on the substrate, the element being electrically connected to the coil;
Lt; / RTI >
The bobbin
And a coil part divided into an inductor part in which the inductor coil is wound and a transformer part in which the transformer coil is wound.
A bobbin having a tubular body portion having a through hole and a plurality of flanges protruding from the body portion in an outer diameter direction;
An inductor coil wound around the bobbin and a plurality of transformer coils; And
A core inserted in the through hole and electromagnetically coupled with the coil;
Lt; / RTI >
The inductor coil is a multi-tap inductor coil having a plurality of extraction taps per section. A plurality of coupling protrusions, which are coupled to the flange and are electrically connected to the inductor coil, function as the extraction tabs. Coil parts.

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