KR101477393B1 - Coil component and electronic device having the same - Google Patents

Abstract

The present invention relates to a coil component capable of placing a plurality of coil parts in one component while minimizing mutual interference. To this end, a coil part according to the present invention comprises: a bobbin part in which two body parts where coils are wound are arranged side by side; And two outer legs disposed on the outer side of the body portion, and a connecting portion connecting the inner legs and the outer legs, wherein the inner legs and the outer legs and the connecting portions, And the core may provide an independent magnetic flux path for each of the coils wound on the two body portions.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a coil component,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil component, and more particularly, to a coil component and an electronic device having the coil component, in which a plurality of coil parts are disposed in one component while minimizing interference between the components.

Switching mode power supply (SMPS) is generally used as a power supply for display devices, printers, and other electric and electronic devices.

SMPS is a modular power supply unit that converts external power supplied to various electric and electronic equipment such as computer, TV, VCR, exchanger, wireless communication equipment, etc., Control and mitigates the impact.

In recent years, as the TV becomes larger, higher power is required. To this end, a plurality of coil components (for example, a DCDC converter) are mounted in the SMPS to light up the backlight of a large panel.

In the case of a DCDC converter of a non-insulation-boosting type mounted on a conventional SMPS, it is generally used by being mounted on one coil component in one converter circuit.

However, as the panel becomes larger, a plurality of coil parts are mounted on the SMPS, which causes a problem that the size of the SMPS becomes larger. In addition, it is disadvantageous in that the production speed is slow and the manufacturing cost is high because a plurality of coil parts must be mounted on a substrate.

Korean Patent Publication No. 2005-0007240

SUMMARY OF THE INVENTION An object of the present invention is to provide an integrated coil component by integrating a plurality of coil components and an electronic apparatus having the same.

It is another object of the present invention to provide a coil component and an electronic apparatus having the same, which can minimize mutual interference even when a plurality of coils are integrated into one component.

A coil part according to the present invention comprises: a bobbin part in which two body parts on which coils are wound are arranged side by side; And two outer legs disposed on the outer side of the body portion, and a connecting portion connecting the inner legs and the outer legs, wherein the inner legs and the outer legs and the connecting portions, And the core may provide an independent magnetic flux path for each of the coils wound on the two body portions.

In this embodiment, the core may be arranged such that the inner legs and the outer legs are arranged side by side.

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In the present embodiment, the core may be formed in an 'eye' shape.

In the present embodiment, the core may be provided with a gap in each of the inner legs.

In this embodiment, the bobbin may be formed by coupling first and second bobbins of the same shape.

In the present embodiment, the first and second bobbins may include a body portion formed in a tubular shape; And a terminal portion formed at both ends of the body portion, wherein the body portion is disposed to be offset toward one side of the terminal portion.

In the present embodiment, the first and second bobbins may be coupled to each other such that the body portion is disposed adjacent to each other.

In the present embodiment, the core may be seated on the upper surface of the terminal portion and coupled with the bobbin.

In this embodiment, at least one coupling protrusion and at least one insertion portion are formed in the terminal portion of the first and second bobbins, respectively. As the coupling protrusion is inserted into the insertion portion, the first and second bobbins Can be mutually coupled.

In the present embodiment, a plurality of external connection terminals can be fastened to the terminal portion.

The coil component according to the present invention also includes a core including two inner legs, two outer legs, and a connecting portion connecting the inner leg and the outer leg; And first and second coil portions respectively coupled to the inner legs, wherein the inner legs, the outer legs, and the connecting portion are configured to have the same overall cross-sectional area, And provide magnetic flux paths independent of each other for the second coil portion.

According to another aspect of the present invention, there is provided a coil component comprising: a body portion formed in a tubular shape; a terminal portion formed at both ends of the body portion and formed to be longer than a diameter of the body portion; wherein the body portion is disposed to be offset to one side of the terminal portion A first bobbin; A second bobbin formed in the same shape as the first bobbin; And a core coupled to the first bobbin and the second bobbin at the same time, wherein the core includes a portion inserted into the body portion of the first and second bobbins, and a portion of the body portion of the first and second bobbins, The portions exposed to the outside may be configured to have the same cross-sectional area, and each of the first bobbin and the second bobbin may be provided with independent magnetic flux paths.

In the present embodiment, the first and second bobbins may be coupled to each other such that the body portion is disposed adjacent to each other.

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According to another aspect of the present invention, there is provided an electronic apparatus including at least two light sources; And at least two light source drivers each connected to the light source to supply power to the light source, wherein the two light source drivers each have a coil part for transforming an input voltage, and each of the coil parts has one The core sharing a magnetic flux path independent of the coil portions.

In the present embodiment, the light source may include an LED array formed by connecting a plurality of LEDs.

In this embodiment, the light source driving unit may include a DC / DC converter.

According to another aspect of the present invention, there is provided an electronic apparatus comprising: a plurality of light sources; And a plurality of DC / DC converters each coupled to the light sources to provide power, wherein at least two of the plurality of DC / DC converters each share one core, Thereby providing independent magnetic flux paths to the coil portions.

According to another aspect of the present invention, there is provided an electronic apparatus comprising: a plurality of light sources; And a plurality of DC / DC converters each coupled to the light sources to provide power, at least two of the plurality of DC / DC converters sharing the coil component to transform the input voltage .

The coil component according to the present invention is configured to constitute two coil parts together in one part, and to use only one core. Therefore, the space (or area) to be mounted on the substrate can be reduced as compared with the conventional case where the two coil portions are mounted as separate components.

Further, even though the coil part according to the present invention integrates two coil parts into one component, since the coupling coefficient is formed close to '0' in the core, the case where two coil parts are constituted as separate parts The same efficiency can be obtained.

Further, in the coil component according to the present invention, the two bobbins coupled to the core are formed in the same shape. Accordingly, after a plurality of bobbins of one kind are manufactured, the two coil bobbins are coupled to each other to manufacture the coil component according to the present embodiment. Thus, there is an advantage that the manufacturing is easy and the manufacturing cost can be reduced.

1 is a perspective view schematically showing a coil part according to an embodiment of the present invention;
Fig. 2 is a perspective view of the coil part shown in Fig. 1, with the coil omitted. Fig.
3 is an exploded perspective view of the coil component shown in Fig.
Fig. 4 is an exploded perspective view schematically showing the bobbin portion of Fig. 1; Fig.
FIG. 5 is a perspective view showing only one bobbin in the bobbin portion of FIG. 4;
6 is a cross-sectional view along AA 'in FIG. 2;
Figures 7 and 8 are cross-sectional views along BB 'of Figure 1;
9 is a circuit diagram of an electronic apparatus according to an embodiment of the present invention.

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.

Fig. 1 is a perspective view schematically showing a coil part according to an embodiment of the present invention, Fig. 2 is a perspective view showing a coil part shown in Fig. 1 without a coil, Fig. 3 is a cross- Fig.

FIG. 4 is an exploded perspective view schematically showing the bobbin portion of FIG. 1, and FIG. 5 is a perspective view showing only one bobbin in the bobbin portion of FIG.

1 to 5, a coil component 100 according to an embodiment of the present invention may include a bobbin 20, a coil 70, and a core 40.

The bobbin portion 20 may be composed of a plurality of bobbins 20a and 20b, as shown in FIG.

4 and 5, each of the bobbins 20a and 20b includes a tubular body portion 22 having a through hole 21 formed at an inner center thereof, A flange portion 23 formed to extend perpendicularly to the outer diameter direction of the portion 22, and a terminal portion 25 formed to extend from the flange portion.

The through hole 21 formed in the body portion 22 is used as a passage through which a part of a core 40 described later is inserted. In this embodiment, the cross-section of the through-hole 21 is formed in a rectangular shape. This structure is formed in accordance with the shape of the core 40 inserted into the through hole 21, but the present invention is not limited thereto. That is, the through holes 21 can be formed in various forms corresponding to the shape of the core 40 inserted into the through holes 21. [

The flange portions 23 may be formed at both ends of the body portion 22, respectively. The space formed between the outer circumferential surface of the body portion 22 and the two flange portions 23 is used as a winding portion 28 in which a coil 70 to be described below is wound. The flange portion 23 serves to support the coil 70 wound on the winding portion 28 from both sides and protects the coil 70 from the outside and ensures insulation between the outside and the coil 70 .

Also, the coil part 100 according to the present embodiment is provided with the projecting portion 27 on the outer surface of any one of the flange portions 23 described later. The projecting portion 27 may be formed in the form of a protrusion protruding outward from the outer surface of the flange portion 23 and may be formed on the flange portion 23 formed on the upper side of the through hole 21 so as to be visually recognizable have.

The protrusion 27 according to the present embodiment is provided to easily identify the winding direction of the coil when the coil 70 is automatically (or manually) wound on the bobbin 20.

The terminal portion 25 may be formed to extend outward from both ends of the body portion 22 of the bobbin 20, that is, the flange portion 23, and at least one external connection terminal 60 may be fastened.

4 and 5, the terminal portion 25 according to the present embodiment may be formed in a shape in which a part of the inner surface of the body portion extends, and may be formed in a shape substantially perpendicular to the flange portion.

Also, the terminal portion 25 may be formed in a shape that is not symmetrical with respect to the body portion 22, and one of the terminal portions 25 is longer. That is, the bobbins 20a and 20b according to the present embodiment may be configured such that the body portion 22 is disposed not at the center of the terminal portion 25 but at a position offset from the terminal portion 25 to one side.

A coupling protrusion 25a and an inserting portion 25b may be formed on the side surface of the terminal portion 25. The coupling protrusions 25a and the insertion portions 25b are provided to integrally form the two bobbins 20a and 20b. The engaging projections 25a and the inserting portions 25b are configured such that when the two bobbins 20a and 20b are engaged, the engaging projections 25a are inserted into the inserting portions 25b of the other bobbins 20a and 20b .

To this end, the coil component 70 according to the present embodiment may have a coupling protrusion 25a and an insertion portion 25b formed at one end of the terminal portion 25, respectively. It is also possible to form the coupling protrusions 25a and the insertion portions 25b at both ends of the terminal portion 25 as shown in FIG. In this case, the bobbins 20a and 20b can be coupled in various directions.

The external connection terminal 60 can be fastened to the terminal portion 25 in such a manner as to protrude outward from the terminal portion 25. [

In this embodiment, the external connection terminal 60 protrudes downward from the lower surface of the terminal portion 25 as an example.

However, the present invention is not limited thereto. That is, the external connection terminal 60 may be fastened so as to protrude horizontally from the side surface of the terminal portion 25, or a part of the external connection terminal 60 may be bent.

3 and 5, the terminal portion 25 according to the present embodiment includes four external connection terminals 60. As shown in Fig. However, the present invention is not limited thereto, and the external connection terminals 60 can be formed in various numbers corresponding to the number of the coils 70.

The two bobbins 20 according to the present embodiment are integrally formed by being combined. In particular, the first and second bobbins 20a and 20b according to the present embodiment may be formed of bobbins 20a and 20b having the same shape.

The first and second bobbins 20a and 20b may be coupled such that the body portions 22 are arranged side by side. Referring to FIG. 4, the first and second bobbins 20a and 20b according to the present embodiment are coupled such that the body portions 22 are disposed adjacent to each other. In addition, the first and second bobbins 20a and 20b may be coupled in such a manner that the respective engaging projections 25a are inserted into the inserting portions 25b.

As the first and second bobbins 20a and 20b are coupled to each other as described above, the first and second bobbins 20a and 20b are arranged such that the respective body portions 22 are disposed at the central portion of the coil component 100, A space in which the terminal portion 25 protrudes is formed outside the portion 22.

In this space, the outer legs 42a and 42b of the core 40, which will be described later, are disposed. The upper portion of the terminal portion 25 protruding from the body portion 22 is used as a space for the outer legs 42a and 42b of the core 40 and the distance of the protrusion of the terminal portion 25 from the body portion 22 (Or thickness) of the outer legs 42a and 42b.

Such a bobbin portion 20 can be easily manufactured by injection molding, but is not limited thereto and may be manufactured by various methods such as press working. In addition, the bobbins 20a and 20b according to the present embodiment are preferably made of an insulating resin material, and are preferably made of a material having high heat resistance and high withstand voltage.

As the material for forming the bobbin portion 20, polyphenylene sulfide (PPS), liquid crystal polyester (LCP), polybutylene terephthalate (PBT), polyethylene terephthalate (PET) have.

The coils 70 are wound on the winding portions 28 formed on the bobbins 20a and 20b, respectively.

The coil 70 may be a single stranded wire, or a plurality of stranded twisted Ritz Wire may be used. The lead wire that is the end of the coil 70 may be electrically and physically connected to the external connection terminal 60 provided in the terminal portion 25 described later.

Meanwhile, in the coil component 100 according to the present embodiment, each of the coils 70 wound on the two bobbins 20a and 20b can be wound in different directions (i.e., opposite directions). For example, when the bobbin 20 is wound on the bobbin 20 in the clockwise direction, the coil may be wound in the counterclockwise direction. However, the present invention is not limited thereto, and various applications such as winding in the opposite direction as the case may be required, or winding both coils in the same direction are possible.

The coil 70 is wound on the first and second bobbins 20a and 20b according to the present embodiment and these coils 70 operate independently of each other through electromagnetic coupling with the core 40 . That is, the first bobbin 20a and the core 40, in which the coil 70 is wound, act as a first coil part, and the second bobbin 20b and the core 40, in which the coil 70 is wound, And can operate as a second coil part independent of the part.

The core 40 is partially inserted into the through hole 21 formed in the bobbins 20a and 20b to form a magnetic path for electromagnetic coupling with the coil 70. [

The cores 40 according to the present embodiment are formed as a pair and can be partially inserted into the through holes 11 of the bobbin 10 so as to be brought into contact with each other.

The core 40 is a ferrite core including a plurality of legs 41a, 41b, 42a, and 42b, and can be used as a path of a magnetic field generated as current flows through the coil 70. [

The pair of cores 40a and 40b may be formed in the same shape symmetrical to each other. In this case, there is an advantage that the core 40 is simple to manufacture and easy to assemble.

The pair of cores 40a and 40b have inner legs 41a and 41b inserted into the bobbins 20a and 20b and outer legs 42a and 42b disposed outside the bobbin 20 And the like. The inner legs 41a and 41b and the outer legs 42a and 42b are connected by a connecting portion 43. [

The inner legs 41a and 41b are inserted into the through holes 11 of the body portion 22. [ Therefore, the inner legs 41a and 41b are formed in a shape corresponding to the end surface of the through hole 21, and may be formed to have a smaller cross sectional area than the through hole 21 so as to facilitate insertion.

In this embodiment, the through hole 21 has a rectangular cross section. Accordingly, the inner legs 41a and 41b can be formed in a shape similar to a rectangular shape.

The inner legs 41a and 41b may be coupled such that their ends face each other in a substantially central portion of the through hole 21. Between the ends of the inner legs 41a and 41b facing each other, The gap 45 can be formed.

The outer legs 42a, 42b may be disposed parallel to the body portion 22 outside the bobbin portion 20. The outer legs 42a and 42b according to the present embodiment may be formed to have the same or wider cross section as the inner legs 41a and 41b.

More specifically, the outer legs 42a and 42b may be formed to surround the body portion 22 of the bobbins 20a and 20b.

The connecting portion 43 connects between the inner legs 41a and 41b and the outer legs 42a and 42b. The connecting portion 43 may be formed to have the same or wider cross section as the inner legs 41a and 41b, like the outer legs 42a and 42b.

The lower surface of the connection portion 43 may be seated on the upper surface of the terminal portion and supported by the terminal portion.

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 as compared with other materials. However, the material of the core 40 is not limited in the embodiment of the present invention.

Meanwhile, in this embodiment, the core 40 is formed in an 'eye' shape, and the inner legs 41a and 41b and the outer legs 42a and 42b are arranged in parallel. Accordingly, the two bobbins 20a and 20b coupled to the core 40 can be arranged in parallel so that the body portions 22 are parallel to each other.

The coil component 100 according to the present embodiment configured as described above is characterized in that two coil parts (L1 in FIG. 7 and L2 in FIG. 8) are constituted by one coil part 70. However, when the coil component 70 is constructed as described above, the two coil portions share one core 40. [

In this case, it is preferable that the respective magnetic fluxes generated in the core 40 by the respective coil portions do not cause interference with each other.

Therefore, in order to minimize the interference of the magnetic fluxes generated in the core 40, the coil component 70 according to the present embodiment includes the inner legs 41a and 41b, the outer legs 42a and 42b, And have the same cross-sectional area.

6 is a cross-sectional view taken along the line A-A 'of FIG. 2, and FIGS. 7 and 8 are cross-sectional views along the line B-B' of FIG.

6, the core 40 has a cross-sectional area A2, A3 of the portion inserted into the bobbins 20a, 20b and a cross-sectional area of the portion disposed outside the bobbins 20a, 20b A1, and A4 are formed to have the same cross-sectional area as each other, the magnetic flux density in the core 40 can be kept constant. For this, the core 40 according to the present embodiment may be configured such that the inner legs 41a and 41b, the outer legs 42a and 42b, and the connecting portion 43 have the same cross-sectional area. Also, a gap is formed in the center of the inner legs 41a and 41b.

Generally, the magnetic flux formed in the core 40 is formed along the most flowable path. In the case of the magnetic flux formed by the first coil portion L1, a path can be formed in the directions A, B, and C as shown in FIG. However, in the case of the B path, it is difficult for the magnetic flux to flow due to the gap 45 of the inner legs 41a and 41b, and in the case of the C path, the overall length of the path becomes longer. Therefore, all of the magnetic fluxes formed by the first coil portion L1 are formed along the A path.

Similarly, the magnetic flux formed by the second coil portion L2 can be formed in the D, E, and F directions as shown in Fig. However, in the case of the E direction, the magnetic flux hardly flows due to the gaps 45 of the inner legs 41a and 41b, and the length of the path becomes longer in the F direction. Therefore, all the magnetic fluxes formed by the second bobbin 20b can flow in the D direction.

As described above, the core 40 according to the present embodiment is configured such that the inner legs 41a and 41b, the outer legs 42a and 42b, and the connecting portion 43 have the same cross-sectional area. Therefore, even if the magnetic flux is formed simultaneously with the A path and the D path, the paths are formed as independent paths with respect to each other, and each of the paths in which the magnetic flux is formed has the same cross sectional area, so that the magnetic flux can be maintained without attenuation of the magnetic flux density.

Thus, since the magnetic flux formed by the first coil part is formed along the path A and the magnetic flux formed by the second coil part is formed along the path D, the two coil parts formed in the core It is possible to prevent the occurrence of interference with each other.

Therefore, in the coil component according to the present embodiment, the coupling factor K between the magnetic flux formed by the first coil portion and the magnetic flux formed by the second coil portion in the same core is formed to be close to '0' .

Unlike the present invention, when interference occurs between two magnetic fluxes and a coupling coefficient in the core is largely formed, a time difference occurs in the duty of the coil part due to the load fluctuation of the two coil parts, There is a possibility that the coil of the coil part becomes saturated, which may reduce the efficiency of the coil part.

However, since the coupling coefficient according to the present embodiment is formed close to '0' even if two coil portions use one core, there is almost no interference between the magnetic fluxes formed by the two coil portions.

Therefore, even if two coil parts are constituted by one part, the same efficiency as that obtained by forming the two coil parts as separate parts can be obtained.

The coil component according to the present embodiment configured as described above is configured so that two coil parts are formed together in one component and only one core is used. Therefore, the space (or area) to be mounted on the substrate can be reduced as compared with the conventional case where the two coil portions are mounted as separate components.

Further, even if two coil parts are integrated into one part, the coil part according to this embodiment is formed so that the coupling coefficient is close to '0' in the core. Therefore, when the two coil parts are constituted by separate parts The same efficiency can be obtained.

Further, in the coil component according to the present embodiment, the two bobbins coupled to the core are formed in the same shape. Accordingly, after a plurality of bobbins of one kind are manufactured, the two coil bobbins are coupled to each other to manufacture the coil component according to the present embodiment. Thus, there is an advantage that the manufacturing is easy and the manufacturing cost can be reduced.

9 is a circuit diagram of an electronic apparatus according to an embodiment of the present invention.

In the present embodiment, an example of an electronic apparatus will be described by taking a display apparatus as an example. However, the configuration of the present invention is not limited thereto, and may include various lighting devices and all devices that emit light through a light source.

The display device 1 according to the present embodiment may include a light source unit S for supplying light to the liquid crystal panel and a light source driver for supplying power to the light source unit S. [

The light source unit S may include a light emitting diode (LED) driven by a DC power source. The light source unit S may include a plurality of light sources S1 and S2 and each of the light sources S1 and S2 may include one LED or a plurality of LEDs.

Each of the light sources S1 and S2 may be arranged in the form of an array in which a predetermined number of LEDs are mounted on a substrate. Here, the LED is driven through a driving power source supplied from a light source driving unit, which will be described later, and emits light through a DC power source having a voltage value higher than a predetermined level.

The light source driving unit supplies electric power to the light source unit S. To this end, the light source driving unit may include DC / DC converters CV1 and CV2 for converting the input power source to a DC power source suitable for driving the light source unit S. [

The DC / DC converters CV1 and CV2 may be provided corresponding to the number of the light sources S1 and S2. In this embodiment, the light source section S includes two LED arrays S1 and S2. Accordingly, two DC / DC converters CV1 and CV2 may be provided and connected to the respective LED arrays S1 and S2.

On the other hand, the two DC / DC converters CV1 and CV2 have the same overall configuration and differ only in the configuration of the coil portions L1 and L2. Therefore, only one DC / DC converter CV1 will be described for the same configuration.

The DC / DC converter CV1 may be connected to a rectifying unit (not shown) or a power factor improving unit (not shown) to receive power Vin and may include a coil part L1 or a transformer . And may further include a switching device M1 and an output rectifying part for rectification.

The switching device M1 is switched in accordance with the switching signal transmitted from the control unit CU1 to control the flow of the current applied from the coil part L1. Here, the switching device M1 may be a transistor.

The output rectifying section can rectify the AC voltage output from the coil section L1 to a DC voltage for supplying the light source S1, that is, the LED array. To this end, the output rectifying part may include a rectifying diode D1 and a smoothing capacitor C1. The rectifier diode D1 may be connected to one end of the secondary winding of the coil section L1. Also, one end of the smoothing capacitor C1 may be connected to the cathode of the rectifier diode D1 and the other end may be connected to the ground.

In addition, the light source driving unit according to the present embodiment may share one core 40 with two DC / DC converters CV1 and CV2 that supply power to two light sources S1 and S2. That is, each of the two DC / DC converters CV1 and CV2 connected to the two light sources S1 and S2 may be constituted by one coil part 100 of each coil part L1 and L2, Coils (portions 70 in Fig. 1) of portions L1 and L2 may share one core 40. [

This configuration is a possible configuration using the above-described coil component (100 in Fig. 1). As described above, the coil component 100 according to the present embodiment is configured to use only one core 40 while two coils (L1 in FIG. 7 and L2 in FIG. And the coils 70 of the respective coil portions L1 and L2 share one core 40. [

As described above, when the coil component 100 according to the present embodiment is used, one coil component 100 can be used for each of the two DC / DC converters CV1 and CV2.

In the conventional case, the coil portion of the DC / DC converter includes independent coil components. Therefore, when two DC / DC converters are constructed, two coil parts must be provided, and the coils of the coil part use separate independent cores.

However, as in this embodiment, if one coil component 100 is used per two DC / DC converters CV1 and CV2 and each of the coils 70 is configured to share one core 40, The space (or area) in which the coil component 100 is mounted can be reduced. In addition, since only one coil component 100 per two DC / DC converters CV1 and CV2 can be mounted on the substrate in the manufacturing process, the time required for manufacturing can be reduced.

Although FIG. 9 shows a case where one coil part is provided corresponding to two light sources S1 and S2, the electronic device according to the present embodiment is not limited thereto. That is, two coil parts can be used when including four light sources, and four coil parts when eight light sources are included.

The above-described coil component according to the present invention is not limited to the above-described embodiment, and various applications are possible. For example, in the above-described embodiments, two bobbins are arranged horizontally with respect to the mounting surface of the substrate, but the present invention is not limited thereto. That is, the present invention is applicable to a variety of applications such as being disposed perpendicularly to the mounting surface of the substrate, or arranged to maintain a specific angle.

In this embodiment, the coil part is employed in the light source driving unit. However, the present invention is not limited to this and can be widely applied to various electronic parts and electronic devices.

20 ..... Bobbin
21 ..... Through hole 22 ..... Body part
23 ..... flange section
25 ..... terminal
25a ..... engaging projection 25b ..... insertion portion
27 ..... protruding portion 28 ..... winding portion
40 ..... core
60 ..... External connection terminal
70 ..... coil
100 ..... coil parts
L1, L2 ..... coil part
CV1, CV2 ..... DC / DC converter

Claims (21)

A bobbin portion in which two body portions on which coils are wound are arranged side by side; And
Wherein the inner leg and the outer leg are connected to each other by two inner legs inserted into the body portion, two outer legs disposed outside the body portion, and a connecting portion connecting the inner legs and the outer legs, A core configured to have the same cross-sectional area;
/ RTI >
Wherein the core provides an independent magnetic flux path for each of the coils wound on the two body portions.
The method according to claim 1,
Wherein the inner legs and the outer legs are disposed side by side.
delete delete The method according to claim 1,
Coil parts formed in 'eye' shape.
The method according to claim 1,
And a gap is formed in each of the inner legs.
The bobbin part according to claim 1,
A coil component formed by combining first and second bobbins of the same shape.
8. The bobbin according to claim 7, wherein the first and second bobbins
The body portion being formed in a tubular shape; And
And terminal portions formed at both ends of the body portion,
And the body portion is disposed to be offset toward one side of the terminal portion.
9. The bobbin according to claim 8, wherein the first and second bobbins
And the body portions are coupled to each other to be disposed adjacent to each other.
9. The method of claim 8,
And a coil part mounted on the upper surface of the terminal part and coupled with the bobbin part.
9. The method of claim 8,
Wherein the first and second bobbins have at least one engaging projection and at least one inserting portion formed on the terminal portion, respectively, and the coil bobbin is engaged with the first and second bobbins as the engaging boss is inserted into the inserting portion .
9. The connector according to claim 8,
A coil component to which a plurality of external connection terminals are fastened.
A core including two inner legs and two outer legs and a connecting portion connecting the inner leg and the outer leg; And
First and second coil portions respectively coupled to the inner legs;
/ RTI >
The inner legs, the outer legs, and the connecting portion are configured to have the same cross-sectional area as a whole,
Wherein the core provides a flux path that is independent of the first coil portion and the second coil portion, respectively.
A first bobbin disposed at one end of the terminal unit, the first bobbin being disposed at one side of the terminal unit; a first bobbin disposed at one end of the body unit;
A second bobbin formed in the same shape as the first bobbin; And
A core coupled to the first bobbin and the second bobbin at the same time;
/ RTI >
The core is configured to have the same cross sectional area as a portion of the first and second bobbins to be inserted into the body portion and a portion of the first and second bobbins to be exposed to the outside of the body portion, A coil component that provides independent flux paths to the bobbin.
15. The bobbin according to claim 14, wherein the first and second bobbins
And the body portions are coupled to each other to be disposed adjacent to each other.
delete At least two light sources; And
At least two light source drivers respectively connected to the light sources to provide power to the light sources;
/ RTI >
Wherein the two light source driving units each have a coil part for transforming an input voltage,
Each of said coil portions sharing one core,
Wherein the core comprises two inner legs inserted into the body portion, two outer legs disposed outside the body portion, and a connecting portion connecting the inner legs and the outer legs, wherein the inner leg, the outer leg, Wherein the connecting portions are configured to have the same cross-sectional area to provide independent magnetic flux paths to the coil portions.
18. The apparatus of claim 17,
And an LED array formed by connecting a plurality of LEDs. 18. The method of claim 17,
Wherein the light source driving unit includes a DC / DC converter.
A plurality of light sources; And
A plurality of DC / DC converters each connected to the light sources to provide power;
/ RTI >
At least two of the plurality of DC / DC converters each share one core,
Wherein the core comprises two inner legs inserted into the body portion, two outer legs disposed outside the body portion, and a connecting portion connecting the inner legs and the outer legs, wherein the inner leg, the outer leg, Wherein the connecting portion is configured to have the same cross-sectional area to provide a magnetic flux path that is independent of each of the coils.
A plurality of light sources; And
A plurality of DC / DC converters each connected to the light sources to provide power;
/ RTI >
Wherein at least two of the plurality of DC / DC converters share one coil component as claimed in claim 1 for transforming an input voltage.

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